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William K. Bedwell
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Okeene, OK, US
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Patents Grants
last 30 patents
Information
Patent Grant
Ultra-light cementitious compositions and related methods
Patent number
10,662,114
Issue date
May 26, 2020
United States Gypsum Company
Dennis Mark Lettkeman
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Grant
Ultra-light cementitious compositions and related methods
Patent number
9,975,808
Issue date
May 22, 2018
United States Gypsum Company
Dennis Mark Lettkeman
E04 - BUILDING
Information
Patent Grant
Cementitious patch compositions and methods
Patent number
9,708,220
Issue date
Jul 18, 2017
United States Gypsum Company
Dennis Mark Lettkeman
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Grant
High strength flooring compositions
Patent number
7,504,165
Issue date
Mar 17, 2009
United States Gypsum Company
Dennis M. Lettkeman
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Grant
High molecular weight additives for calcined gypsum and cementitiou...
Patent number
7,338,990
Issue date
Mar 4, 2008
United States Gypsum Company
Dennis Mark Lettkeman
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Grant
High strength flooring compositions
Patent number
7,056,964
Issue date
Jun 6, 2006
United States Gypsum Company
Dennis Mark Lettkeman
B28 - WORKING CEMENT, CLAY, OR STONE
Patents Applications
last 30 patents
Information
Patent Application
GYPSUM CEMENT COMPOSITIONS WITH AGGREGATE STABILIZERS AND METHODS F...
Publication number
20230110018
Publication date
Apr 13, 2023
United States Gypsum Company
Karl Glenn Niessner
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Application
ULTRA-LIGHT CEMENTITIOUS COMPOSITIONS AND RELATED METHODS
Publication number
20180237341
Publication date
Aug 23, 2018
United States Gypsum Company
Dennis Mark Lettkeman
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Application
CEMENTITIOUS PATCH COMPOSITIONS AND METHODS
Publication number
20160340251
Publication date
Nov 24, 2016
United States Gypsum Company
Dennis Mark Lettkeman
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Application
ULTRA-LIGHT CEMENTITIOUS COMPOSITIONS AND RELATED METHODS
Publication number
20150315081
Publication date
Nov 5, 2015
United States Gypsum Company
Dennis Mark Lettkeman
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Application
High strength flooring compositions
Publication number
20060280970
Publication date
Dec 14, 2006
United States Gypsum Company
Dennis M. Lettkeman
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Application
High strength flooring compositions
Publication number
20050250888
Publication date
Nov 10, 2005
Dennis Mark Lettkeman
B28 - WORKING CEMENT, CLAY, OR STONE
Information
Patent Application
High molecular weight additives for calcined gypsum and cementitiou...
Publication number
20050239924
Publication date
Oct 27, 2005
Dennis Mark Lettkeman
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES