Friedhelm Steffens

Person

Leverkusen, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Method for recovering raw materials from polyurethane products
- Patent number 12,187,858
- Issue date Jan 7, 2025
- Covestro Deutschland AG
- Friedhelm Steffens
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Method and a system for separating and treating impurities from a h...
- Patent number 11,267,703
- Issue date Mar 8, 2022
- Covestro Deutschland AG
- Andre Rittermeier
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Distributor device, in particular for falling film evaporators, and...
- Patent number 10,894,222
- Issue date Jan 19, 2021
- Covestro Deutschland AG
- Christian Drumm
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Aniline purification process
- Patent number 10,889,539
- Issue date Jan 12, 2021
- Covestro Deutschland AG
- Michael Merkel
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for producing TDI-trimerisates with high purity
- Patent number 10,676,448
- Issue date Jun 9, 2020
- Covestro Deutschland AG
- Josef Sanders
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Distillation column and use thereof for cleaning isocyanates
- Patent number 10,576,392
- Issue date Mar 3, 2020
- Covestro Deutschland AG
- Friedhelm Steffens
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for producing isocyanates
- Patent number 10,435,353
- Issue date Oct 8, 2019
- Covestro Deutschland AG
- Joachim Zechlin
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for producing isocyanates
- Patent number 10,239,826
- Issue date Mar 26, 2019
- Covestro Deutschland AG
- Friedhelm Steffens
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for producing light-coloured TDI-polyisocyanates
- Patent number 10,189,945
- Issue date Jan 29, 2019
- Covestro Deutschland AG
- Josef Sanders
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for dividing fluid streams
- Patent number 10,143,987
- Issue date Dec 4, 2018
- Covestro Deutschland AG
- Berthold Keggenhoff
- F26 - DRYING
Information Patent Grant
Method for producing TDI-trimerisates with high purity
- Patent number 10,131,641
- Issue date Nov 20, 2018
- Covestro Deutschland AG
- Josef Sanders
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for purifying raw-material gases by fractionation
- Patent number 10,011,484
- Issue date Jul 3, 2018
- COVERSTRO DEUTSCHLAND AG
- Alfred Soppe
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for purifying raw-material gases by fractionation
- Patent number 9,938,147
- Issue date Apr 10, 2018
- Covestro Deutschland AG
- Alfred Soppe
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for separating an isocyanate prepared by phosgenation of a...
- Patent number 9,932,299
- Issue date Apr 3, 2018
- Covestro Deutschland AG
- Friedhelm Steffens
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for operating a gas phase phosgenation plant
- Patent number 9,845,286
- Issue date Dec 19, 2017
- Covestro Deutschland AG
- Thomas Knauf
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for operating a gas-phase phosgenation plant
- Patent number 9,840,461
- Issue date Dec 12, 2017
- Covestro Deutschland AG
- Thomas Knauf
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for obtaining organic isocyanates from distillation residue...
- Patent number 9,688,619
- Issue date Jun 27, 2017
- Covestro Deutschland AG
- Klaus Tidow
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Device and method for producing phosgene
- Patent number 9,480,958
- Issue date Nov 1, 2016
- Covestro Deutschland AG
- Ulrich Hollmann
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Method for producing isocyanates
- Patent number 9,376,377
- Issue date Jun 28, 2016
- Covestro Deutschland AG
- Friedhelm Steffens
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of isocyanates in the gas phase
- Patent number 9,365,503
- Issue date Jun 14, 2016
- Covestro Deutschland AG
- Klaus Biskup
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for working up distillation residues from isocyanate production
- Patent number 9,029,595
- Issue date May 12, 2015
- Bayer MaterialScience AG
- Friedhelm Steffens
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of isocyanates in the gas phase
- Patent number 9,024,057
- Issue date May 5, 2015
- Bayer MaterialScience AG
- Klaus Biskup
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of isocyanates
- Patent number 8,563,768
- Issue date Oct 22, 2013
- Bayer MaterialScience AG
- Rainer Bruns
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the production of aromatic diisocyanates in the gas
- Patent number 8,399,702
- Issue date Mar 19, 2013
- Bayer MaterialScience AG
- Fritz Pohl
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of toluene-diisocyanate
- Patent number 8,063,241
- Issue date Nov 22, 2011
- Bayer MaterialScience AG
- Wolfgang Lorenz
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the production of toluene diisocyanate
- Patent number 8,030,522
- Issue date Oct 4, 2011
- Bayer MaterialScience LLC
- Joachim Zechlin
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of isocyanates
- Patent number 7,645,900
- Issue date Jan 12, 2010
- Bayer MaterialScience AG
- Wolfgang Lorenz
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of isocyanates in the gas phase
- Patent number 7,615,662
- Issue date Nov 10, 2009
- Bayer MaterialScience AG
- Fritz Pohl
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the distillative separation of aqueous amine solutions
- Patent number 7,575,660
- Issue date Aug 18, 2009
- Bayer MaterialScience AG
- Friedhelm Steffens
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for purification of anhydrous hydrogen chloride gas
- Patent number 7,555,917
- Issue date Jul 7, 2009
- Bayer MaterialScience LLC
- Bill L. Brady, Jr.
- C01 - INORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
Obtaining Aliphatic Amines from Compositions
- Publication number 20240343674
- Publication date Oct 17, 2024
- Genomatica, Inc.
- Michael Merkel
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
Method for the Removal of Water from and Transport of Aliphatic Dia...
- Publication number 20240336554
- Publication date Oct 10, 2024
- COVESTRO DEUTSCHLAND AG
- Michael Merkel
- C07 - ORGANIC CHEMISTRY
Information Patent Application
PROCESS FOR RECOVERING RAW MATERIALS FROM POLYURETHANE FOAMS
- Publication number 20240101783
- Publication date Mar 28, 2024
- COVESTRO DEUTSCHLAND AG
- Sebastian Pohl
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
METHOD FOR RECOVERING RAW MATERIALS FROM POLYURETHANE PRODUCTS
- Publication number 20230357532
- Publication date Nov 9, 2023
- COVESTRO DEUTSCHLAND AG
- Friedhelm Steffens
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
METHOD FOR THE PURIFICATION OF ANILINE
- Publication number 20220348533
- Publication date Nov 3, 2022
- Covestro Intellectual Property GmbH & Co. KG
- Friedhelm Steffens
- C07 - ORGANIC CHEMISTRY
Information Patent Application
METHOD FOR RECOVERING RAW MATERIALS FROM POLYURETHANE PRODUCTS
- Publication number 20220251328
- Publication date Aug 11, 2022
- COVESTRO DEUTSCHLAND AG
- Friedhelm Steffens
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
ANILINE PURIFICATION PROCESS
- Publication number 20200123097
- Publication date Apr 23, 2020
- COVESTRO DEUTSCHLAND AG
- Michael Merkel
- C07 - ORGANIC CHEMISTRY
Information Patent Application
DISTRIBUTOR DEVICE, IN PARTICULAR FOR FALLING FILM EVAPORATORS, AND...
- Publication number 20200030712
- Publication date Jan 30, 2020
- COVESTRO DEUTSCHLAND AG
- Christian DRUMM
- C07 - ORGANIC CHEMISTRY
Information Patent Application
A METHOD AND A SYSTEM FOR SEPARATING AND TREATING IMPURITIES FROM A...
- Publication number 20190194018
- Publication date Jun 27, 2019
- COVESTRO DEUTSCHLAND AG
- Andre RITTERMEIER
- C01 - INORGANIC CHEMISTRY
Information Patent Application
METHOD FOR PRODUCING TDI-TRIMERISATES WITH HIGH PURITY
- Publication number 20190031625
- Publication date Jan 31, 2019
- COVESTRO DEUTSCHLAND AG
- Josef Sanders
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
METHOD FOR PRODUCING ISOCYANATES
- Publication number 20180370907
- Publication date Dec 27, 2018
- COVESTRO DEUTSCHLAND AG
- Joachim Zechlin
- C07 - ORGANIC CHEMISTRY
Information Patent Application
DISTILLATION COLUMN AND USE THEREOF FOR CLEANING ISOCYANATES
- Publication number 20180318728
- Publication date Nov 8, 2018
- COVESTRO DEUTSCHLAND AG
- Friedhelm Steffens
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
METHOD FOR PRODUCING ISOCYANATES
- Publication number 20180194720
- Publication date Jul 12, 2018
- COVESTRO DEUTSCHLAND AG
- Friedhelm Steffens
- C07 - ORGANIC CHEMISTRY
Information Patent Application
PROCESS FOR PURIFYING RAW-MATERIAL GASES BY FRACTIONATION
- Publication number 20180186633
- Publication date Jul 5, 2018
- Covestro Deutschland AG
- Alfred Soppe
- C01 - INORGANIC CHEMISTRY
Information Patent Application
METHOD FOR OPERATING A GAS-PHASE PHOSGENATION PLANT
- Publication number 20170101367
- Publication date Apr 13, 2017
- COVESTRO DEUTSCHLAND AG
- Thomas Knauf
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
PROCESS FOR OPERATING A GAS PHASE PHOSGENATION PLANT
- Publication number 20170096389
- Publication date Apr 6, 2017
- COVESTRO DEUTSCHLAND AG
- Thomas Knauf
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
PROCESS FOR OBTAINING ORGANIC ISOCYANATES FROM DISTILLATION RESIDUE...
- Publication number 20160159734
- Publication date Jun 9, 2016
- COVESTRO DEUTSCHLAND AG
- Klaus Tidow
- C07 - ORGANIC CHEMISTRY
Information Patent Application
METHOD FOR PRODUCING ISOCYANATES
- Publication number 20160152558
- Publication date Jun 2, 2016
- COVESTRO DEUTSCHLAND AG
- Friedhelm Steffens
- C07 - ORGANIC CHEMISTRY
Information Patent Application
PROCESS FOR PURIFYING RAW-MATERIAL GASES BY FRACTIONATION
- Publication number 20160096731
- Publication date Apr 7, 2016
- COVERSTRO DEUTSCHLAND AG
- Alfred Soppe
- C01 - INORGANIC CHEMISTRY
Information Patent Application
METHOD FOR PRODUCING TDI-TRIMERISATES WITH HIGH PURITY
- Publication number 20160031834
- Publication date Feb 4, 2016
- Bayer MaterialScience AG
- Josef SANDERS
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
METHOD FOR PRODUCING LIGHT-COLOURED TDI-POLYISOCANTES
- Publication number 20160017097
- Publication date Jan 21, 2016
- Bayer MaterialScience AG
- Josef SANDERS
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
PROCESS FOR SEPARATING AN ISOCYANATE PREPARED BY PHOSGENATION OF A...
- Publication number 20150368190
- Publication date Dec 24, 2015
- Bayer MaterialScience AG
- Friedhelm STEFFENS
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
DEVICE AND METHOD FOR PRODUCING PHOSGENE
- Publication number 20150165407
- Publication date Jun 18, 2015
- Bayer MaterialScience AG
- Ulrich Hollmann
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
METHOD FOR WORKING UP DISTILLATION RESIDUES FROM ISOCYANATE PRODUCTION
- Publication number 20150126769
- Publication date May 7, 2015
- Bayer MaterialScience LLC
- Friedhelm Steffens
- C07 - ORGANIC CHEMISTRY
Information Patent Application
PROCESS FOR THE PREPARATION OF ISOCYANATES
- Publication number 20120123152
- Publication date May 17, 2012
- Bayer MaterialScience AG
- Rainer Bruns
- C07 - ORGANIC CHEMISTRY
Information Patent Application
PROCESS FOR THE PREPARATION OF TOLUENE-DIISOCYANATE
- Publication number 20110021811
- Publication date Jan 27, 2011
- Bayer MaterialScience AG
- Wolfgang Lorenz
- C07 - ORGANIC CHEMISTRY
Information Patent Application
PROCESS FOR THE PREPARATION OF ISOCYANATES IN THE GAS PHASE
- Publication number 20100160673
- Publication date Jun 24, 2010
- Bayer MaterialScience AG
- Rainer Bruns
- C07 - ORGANIC CHEMISTRY
Information Patent Application
PROCESS FOR THE PREPARATION OF ISOCYANATES IN THE GAS PHASE
- Publication number 20100160674
- Publication date Jun 24, 2010
- Bayer MaterialScience AG
- Klaus Biskup
- C07 - ORGANIC CHEMISTRY
Information Patent Application
PROCESS FOR THE PREPARATION OF ISOCYANATES IN THE GAS PHASE
- Publication number 20100152484
- Publication date Jun 17, 2010
- Bayer MaterialScience AG
- Klaus Biskup
- C07 - ORGANIC CHEMISTRY
Information Patent Application
METHOD FOR DIVIDING FLUID STREAMS
- Publication number 20100071770
- Publication date Mar 25, 2010
- Bayer MaterialScience AG
- Berthold Keggenhoff
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

Friedhelm Steffens

Person

Patents Grantslast 30 patents

Method for recovering raw materials from polyurethane products

Method and a system for separating and treating impurities from a h...

Distributor device, in particular for falling film evaporators, and...

Aniline purification process

Method for producing TDI-trimerisates with high purity

Distillation column and use thereof for cleaning isocyanates

Method for producing isocyanates

Method for producing isocyanates

Method for producing light-coloured TDI-polyisocyanates

Method for dividing fluid streams

Method for producing TDI-trimerisates with high purity

Process for purifying raw-material gases by fractionation

Process for purifying raw-material gases by fractionation

Process for separating an isocyanate prepared by phosgenation of a...

Process for operating a gas phase phosgenation plant

Method for operating a gas-phase phosgenation plant

Process for obtaining organic isocyanates from distillation residue...

Device and method for producing phosgene

Method for producing isocyanates

Process for the preparation of isocyanates in the gas phase

Method for working up distillation residues from isocyanate production

Process for the preparation of isocyanates in the gas phase

Process for the preparation of isocyanates

Process for the production of aromatic diisocyanates in the gas

Process for the preparation of toluene-diisocyanate

Process for the production of toluene diisocyanate

Process for the preparation of isocyanates

Process for the preparation of isocyanates in the gas phase

Process for the distillative separation of aqueous amine solutions

Process for purification of anhydrous hydrogen chloride gas

Patents Applicationslast 30 patents

Obtaining Aliphatic Amines from Compositions

Method for the Removal of Water from and Transport of Aliphatic Dia...

PROCESS FOR RECOVERING RAW MATERIALS FROM POLYURETHANE FOAMS

METHOD FOR RECOVERING RAW MATERIALS FROM POLYURETHANE PRODUCTS

METHOD FOR THE PURIFICATION OF ANILINE

METHOD FOR RECOVERING RAW MATERIALS FROM POLYURETHANE PRODUCTS

ANILINE PURIFICATION PROCESS

DISTRIBUTOR DEVICE, IN PARTICULAR FOR FALLING FILM EVAPORATORS, AND...

A METHOD AND A SYSTEM FOR SEPARATING AND TREATING IMPURITIES FROM A...

METHOD FOR PRODUCING TDI-TRIMERISATES WITH HIGH PURITY

METHOD FOR PRODUCING ISOCYANATES

DISTILLATION COLUMN AND USE THEREOF FOR CLEANING ISOCYANATES

METHOD FOR PRODUCING ISOCYANATES

PROCESS FOR PURIFYING RAW-MATERIAL GASES BY FRACTIONATION

METHOD FOR OPERATING A GAS-PHASE PHOSGENATION PLANT

PROCESS FOR OPERATING A GAS PHASE PHOSGENATION PLANT

PROCESS FOR OBTAINING ORGANIC ISOCYANATES FROM DISTILLATION RESIDUE...

METHOD FOR PRODUCING ISOCYANATES

PROCESS FOR PURIFYING RAW-MATERIAL GASES BY FRACTIONATION

METHOD FOR PRODUCING TDI-TRIMERISATES WITH HIGH PURITY

METHOD FOR PRODUCING LIGHT-COLOURED TDI-POLYISOCANTES

PROCESS FOR SEPARATING AN ISOCYANATE PREPARED BY PHOSGENATION OF A...

DEVICE AND METHOD FOR PRODUCING PHOSGENE

METHOD FOR WORKING UP DISTILLATION RESIDUES FROM ISOCYANATE PRODUCTION

PROCESS FOR THE PREPARATION OF ISOCYANATES

PROCESS FOR THE PREPARATION OF TOLUENE-DIISOCYANATE

PROCESS FOR THE PREPARATION OF ISOCYANATES IN THE GAS PHASE

PROCESS FOR THE PREPARATION OF ISOCYANATES IN THE GAS PHASE

PROCESS FOR THE PREPARATION OF ISOCYANATES IN THE GAS PHASE

METHOD FOR DIVIDING FLUID STREAMS