obtaining cements characterised by fineness

Industry

CPC
C04B7/527

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Parent Industries

CCHEMISTRY METALLURGY C04Concrete, cement, ceramics C04BLIME, MAGNESIA SLAG CEMENTS COMPOSITIONS THEREOF C04B7/00Hydraulic cements

Current Industry

C04B7/527obtaining cements characterised by fineness

Industries

Patents Grantslast 30 patents

Information Patent Grant
Multi-component inorganic anchoring system based on fine aluminous...
- Patent number 12,077,475
- Issue date Sep 3, 2024
- Hilti Aktiengesellschaft
- Armin Pfeil
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Friction materials with low storage time for brake pads based on bi...
- Patent number 11,982,330
- Issue date May 14, 2024
- HEIDELBERGCEMENT AG
- Flavio Rampinelli
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Hydraulic cement composition, process and use
- Patent number 11,981,860
- Issue date May 14, 2024
- Uniao Brasileira de Educacao e Assistencia—Mantenedora da PUCRS
- Gabriela Gonçalves Dias Ponzi
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Room temperature curable quick-setting high-strength alkali-activat...
- Patent number 11,834,381
- Issue date Dec 5, 2023
- XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
- Hui Li
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Method for manufacturing binders hardening by hydration and carbona...
- Patent number 11,384,017
- Issue date Jul 12, 2022
- HConnect 2 GmbH
- Jan Skocek
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Development of retarded acid system
- Patent number 11,365,339
- Issue date Jun 21, 2022
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Spacer fluids and cement slurries that include surfactants
- Patent number 11,261,364
- Issue date Mar 1, 2022
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Emulsifier compositions for invert emulsion fluids and methods of u...
- Patent number 11,248,157
- Issue date Feb 15, 2022
- Saudi Arabian Oil Company
- Vikrant Wagle
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Lubricants for water-based drilling fluids
- Patent number 11,098,232
- Issue date Aug 24, 2021
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- E21 - EARTH DRILLING MINING
Information Patent Grant
Spacer fluid compositions that include surfactants
- Patent number 11,098,231
- Issue date Aug 24, 2021
- Saudi Arabian Oil Company
- Hussain AlBahrani
- E21 - EARTH DRILLING MINING
Information Patent Grant
Methods of using drilling fluid compositions with enhanced rheology
- Patent number 11,091,682
- Issue date Aug 17, 2021
- Saudi Arabian Oil Company
- Hussain AlBahrani
- E21 - EARTH DRILLING MINING
Information Patent Grant
Spacer fluid compositions, methods, and systems for aqueous based d...
- Patent number 11,078,396
- Issue date Aug 3, 2021
- Saudi Arabian Oil Company
- Hussain AlBahrani
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Spacer fluid compositions, methods, and systems for aqueous based d...
- Patent number 11,078,397
- Issue date Aug 3, 2021
- Saudi Arabian Oil Company
- Hussain AlBahrani
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Enhanced filtration control packages, wellbore servicing fluids uti...
- Patent number 11,034,875
- Issue date Jun 15, 2021
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Cement slurries, cured cements and methods of making and use thereof
- Patent number 11,015,104
- Issue date May 25, 2021
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Cement slurries, cured cements and methods of making and use thereof
- Patent number 11,015,105
- Issue date May 25, 2021
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Quick-setting concrete mixture and method of manufacture
- Patent number 10,961,155
- Issue date Mar 30, 2021
- Green Crete Solutions, LLC
- Kevin James Sobczak
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Development of anti-bit balling fluids
- Patent number 10,961,426
- Issue date Mar 30, 2021
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Enhanced filtration control packages, wellbore servicing fluids uti...
- Patent number 10,876,028
- Issue date Dec 29, 2020
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Development of anti-bit balling fluids
- Patent number 10,851,281
- Issue date Dec 1, 2020
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Spacer fluids and cement slurries that include surfactants
- Patent number 10,844,266
- Issue date Nov 24, 2020
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Retarded acid systems, emulsions, and methods for using in acidizin...
- Patent number 10,822,534
- Issue date Nov 3, 2020
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Use of mineral fines to reduce clinker content of cementitious comp...
- Patent number 10,737,980
- Issue date Aug 11, 2020
- ROMAN CEMENT, LLC
- John M. Guynn
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Use of quarry fines and/or limestone powder to reduce clinker conte...
- Patent number 10,730,805
- Issue date Aug 4, 2020
- ROMAN CEMENT, LLC
- John M. Guynn
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Development of retarded acid system
- Patent number 10,703,957
- Issue date Jul 7, 2020
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Cements and cement mixtures with high mechanical performance at sho...
- Patent number 10,689,295
- Issue date Jun 23, 2020
- Serafin Lizarraga Galarza
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Invert emulsion based drilling fluid and methods of using same
- Patent number 10,683,447
- Issue date Jun 16, 2020
- Saudi Arabian Oil Company
- Vikrant Wagle
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Lubricants for water-based drilling fluids
- Patent number 10,662,363
- Issue date May 26, 2020
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Dispersant in cement formulations for oil and gas wells
- Patent number 10,640,695
- Issue date May 5, 2020
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Spacer fluid compositions that include surfactants
- Patent number 10,590,325
- Issue date Mar 17, 2020
- Saudi Arabian Oil Company
- Hussain AlBahrani
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
METHOD FOR PREPARING GENERAL-PURPOSE CEMENT
- Publication number 20240360034
- Publication date Oct 31, 2024
- HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
- Meixun PENG
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
METHOD FOR PRODUCTION OF A MODIFIED CEMENT POWDER AND A METHOD FOR...
- Publication number 20240318080
- Publication date Sep 26, 2024
- Hamed NIROUMAND
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
TARGETED ADDITION OF GRINDING AIDS DURING A GRINDING PROCESS
- Publication number 20240308906
- Publication date Sep 19, 2024
- CEMEX Innovation Holding AG
- Julien CHAPELAT
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
HYDRAULIC CEMENT COMPOSITION, PROCESS AND USE
- Publication number 20240279530
- Publication date Aug 22, 2024
- Uniao Brasileira de Educacao e Assistencia - Mantenedora da PUCRS
- Gabriela GONÇALVES DIAS PONZI
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
POZZOLAN BASED CEMENT AND METHOD OF MAKING AND USING SAME
- Publication number 20230373859
- Publication date Nov 23, 2023
- Comus Construction, LLC
- Brad Hill
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
Concrete Element and Method for its Production
- Publication number 20230138864
- Publication date May 4, 2023
- METTEN Technologies GmbH & Co. KG
- Guido Volmer
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
PRODUCTION OF SUPPLEMENTARY CEMENTITIOUS MATERIALS THROUGH SEMI-WET...
- Publication number 20230023151
- Publication date Jan 26, 2023
- SOLIDIA TECHNOLOGIES, INC.
- Vahit Atakan
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
METHODS FOR PRODUCING CEMENT COMPRISING A SUPPLEMENTARY CEMENTITIOU...
- Publication number 20220411327
- Publication date Dec 29, 2022
- Cemgreen APS
- Lasse Norbye Dossing
- F27 - FURNACES KILNS OVENS RETORTS
Information Patent Application
HYDRAULIC CEMENT COMPOSITION, PROCESS AND USE
- Publication number 20220403223
- Publication date Dec 22, 2022
- UNIÃO BRASILEIRA DE EDUCAGAO E ASSISTENCIA—MANTENEDORA DA PUCRS
- GABRIELA GONÇALVES DIAS PONZI
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
USE OF ANIMAL BY-PRODUCTS FOR CEMENT PRODUCTION
- Publication number 20220298067
- Publication date Sep 22, 2022
- University of Kentucky Research Foundation
- Tristana Duvallet
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
SPACER FLUIDS AND CEMENT SLURRIES THAT INCLUDE SURFACTANTS
- Publication number 20210032525
- Publication date Feb 4, 2021
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- E21 - EARTH DRILLING MINING
Information Patent Application
EMULSIFIED DRILLING FLUIDS AND METHODS OF MAKING AND USE THEREOF
- Publication number 20200407621
- Publication date Dec 31, 2020
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
METHOD FOR MANUFACTURING BINDERS HARDENING BY HYDRATION AND CARBONA...
- Publication number 20200392043
- Publication date Dec 17, 2020
- HConnect 2 GmbH
- Jan SKOCEK
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
DEVELOPMENT OF RETARDED ACID SYSTEM
- Publication number 20200291285
- Publication date Sep 17, 2020
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Application
LUBRICANTS FOR WATER-BASED DRILLING FLUIDS
- Publication number 20200248061
- Publication date Aug 6, 2020
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
SPACER FLUID COMPOSITIONS THAT INCLUDE SURFACTANTS
- Publication number 20200165504
- Publication date May 28, 2020
- Saudi Arabian Oil Company
- Hussain AlBahrani
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
METHODS OF USING DRILLING FLUID COMPOSITIONS WITH ENHANCED RHEOLOGY
- Publication number 20200140739
- Publication date May 7, 2020
- Saudi Arabian Oil Company
- Hussain AlBahrani
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Application
DEVELOPMENT OF ANTI-BIT BALLING FLUIDS
- Publication number 20200095491
- Publication date Mar 26, 2020
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
EMULSIFIER COMPOSITIONS FOR INVERT EMULSION FLUIDS AND METHODS OF U...
- Publication number 20200087560
- Publication date Mar 19, 2020
- Saudi Arabian Oil Company
- Vikrant Wagle
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
DEVELOPMENT OF ANTI-BIT BALLING FLUIDS
- Publication number 20200040247
- Publication date Feb 6, 2020
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
QUICK-SETTING CONCRETE MIXTURE AND METHOD OF MANUFACTURE
- Publication number 20190330112
- Publication date Oct 31, 2019
- Kevin James Sobczak
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
DEVELOPMENT OF ANTI-BIT BALLING FLUIDS
- Publication number 20190309210
- Publication date Oct 10, 2019
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
SPACER FLUID COMPOSITIONS, METHODS, AND SYSTEMS FOR AQUEOUS BASED D...
- Publication number 20190292432
- Publication date Sep 26, 2019
- Saudi Arabian Oil Company
- Hussain AlBahrani
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
SPACER FLUID COMPOSITIONS, METHODS, AND SYSTEMS FOR AQUEOUS BASED D...
- Publication number 20190292431
- Publication date Sep 26, 2019
- Saudi Arabian Oil Company
- Hussain AlBahrani
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
ENHANCED FILTRATION CONTROL PACKAGES, WELLBORE SERVICING FLUIDS UTI...
- Publication number 20190233708
- Publication date Aug 1, 2019
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Application
ENHANCED FILTRATION CONTROL PACKAGES, WELLBORE SERVICING FLUIDS UTI...
- Publication number 20190233707
- Publication date Aug 1, 2019
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Application
CEMENT SLURRIES, CURED CEMENTS AND METHODS OF MAKING AND USE THEREOF
- Publication number 20190203095
- Publication date Jul 4, 2019
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Application
CEMENT SLURRIES, CURED CEMENTS AND METHODS OF MAKING AND USE THEREOF
- Publication number 20190203096
- Publication date Jul 4, 2019
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Application
DISPERSANT IN CEMENT FORMULATIONS FOR OIL AND GAS WELLS
- Publication number 20190092996
- Publication date Mar 28, 2019
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
DISPERSANT IN CEMENT FORMULATIONS FOR OIL AND GAS WELLS
- Publication number 20180312439
- Publication date Nov 1, 2018
- Saudi Arabian Oil Company
- Abdullah Al-Yami
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES

obtaining cements characterised by fineness

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Multi-component inorganic anchoring system based on fine aluminous...

Friction materials with low storage time for brake pads based on bi...

Hydraulic cement composition, process and use

Room temperature curable quick-setting high-strength alkali-activat...

Method for manufacturing binders hardening by hydration and carbona...

Development of retarded acid system

Spacer fluids and cement slurries that include surfactants

Emulsifier compositions for invert emulsion fluids and methods of u...

Lubricants for water-based drilling fluids

Spacer fluid compositions that include surfactants

Methods of using drilling fluid compositions with enhanced rheology

Spacer fluid compositions, methods, and systems for aqueous based d...

Spacer fluid compositions, methods, and systems for aqueous based d...

Enhanced filtration control packages, wellbore servicing fluids uti...

Cement slurries, cured cements and methods of making and use thereof

Cement slurries, cured cements and methods of making and use thereof

Quick-setting concrete mixture and method of manufacture

Development of anti-bit balling fluids

Enhanced filtration control packages, wellbore servicing fluids uti...

Development of anti-bit balling fluids

Spacer fluids and cement slurries that include surfactants

Retarded acid systems, emulsions, and methods for using in acidizin...

Use of mineral fines to reduce clinker content of cementitious comp...

Use of quarry fines and/or limestone powder to reduce clinker conte...

Development of retarded acid system

Cements and cement mixtures with high mechanical performance at sho...

Invert emulsion based drilling fluid and methods of using same

Lubricants for water-based drilling fluids

Dispersant in cement formulations for oil and gas wells

Spacer fluid compositions that include surfactants

Patents Applicationslast 30 patents

METHOD FOR PREPARING GENERAL-PURPOSE CEMENT

METHOD FOR PRODUCTION OF A MODIFIED CEMENT POWDER AND A METHOD FOR...

TARGETED ADDITION OF GRINDING AIDS DURING A GRINDING PROCESS

HYDRAULIC CEMENT COMPOSITION, PROCESS AND USE

POZZOLAN BASED CEMENT AND METHOD OF MAKING AND USING SAME

Concrete Element and Method for its Production

PRODUCTION OF SUPPLEMENTARY CEMENTITIOUS MATERIALS THROUGH SEMI-WET...

METHODS FOR PRODUCING CEMENT COMPRISING A SUPPLEMENTARY CEMENTITIOU...

HYDRAULIC CEMENT COMPOSITION, PROCESS AND USE

USE OF ANIMAL BY-PRODUCTS FOR CEMENT PRODUCTION

SPACER FLUIDS AND CEMENT SLURRIES THAT INCLUDE SURFACTANTS

EMULSIFIED DRILLING FLUIDS AND METHODS OF MAKING AND USE THEREOF

METHOD FOR MANUFACTURING BINDERS HARDENING BY HYDRATION AND CARBONA...

DEVELOPMENT OF RETARDED ACID SYSTEM

LUBRICANTS FOR WATER-BASED DRILLING FLUIDS

SPACER FLUID COMPOSITIONS THAT INCLUDE SURFACTANTS

METHODS OF USING DRILLING FLUID COMPOSITIONS WITH ENHANCED RHEOLOGY

DEVELOPMENT OF ANTI-BIT BALLING FLUIDS

EMULSIFIER COMPOSITIONS FOR INVERT EMULSION FLUIDS AND METHODS OF U...

DEVELOPMENT OF ANTI-BIT BALLING FLUIDS

QUICK-SETTING CONCRETE MIXTURE AND METHOD OF MANUFACTURE

DEVELOPMENT OF ANTI-BIT BALLING FLUIDS

SPACER FLUID COMPOSITIONS, METHODS, AND SYSTEMS FOR AQUEOUS BASED D...

SPACER FLUID COMPOSITIONS, METHODS, AND SYSTEMS FOR AQUEOUS BASED D...

ENHANCED FILTRATION CONTROL PACKAGES, WELLBORE SERVICING FLUIDS UTI...

ENHANCED FILTRATION CONTROL PACKAGES, WELLBORE SERVICING FLUIDS UTI...

CEMENT SLURRIES, CURED CEMENTS AND METHODS OF MAKING AND USE THEREOF

CEMENT SLURRIES, CURED CEMENTS AND METHODS OF MAKING AND USE THEREOF

DISPERSANT IN CEMENT FORMULATIONS FOR OIL AND GAS WELLS

DISPERSANT IN CEMENT FORMULATIONS FOR OIL AND GAS WELLS