Maryn L. Heermann

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Charlotte, NC, US

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Patents Grantslast 30 patents

Information Patent Grant
Gypsum wallboard and method of making same
- Patent number 9,523,198
- Issue date Dec 20, 2016
- National Gypsum Properties, LLC
- William C. Martin
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Gypsum wallboard and method of making same
- Patent number 8,016,961
- Issue date Sep 13, 2011
- National Gypsum Properties, LLC
- William C. Martin
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES

Patents Applicationslast 30 patents

Information Patent Application
Gypsum Wallboard and Method of Making Same
- Publication number 20110293916
- Publication date Dec 1, 2011
- NATIONAL GYPSUM PROPERTIES, LLC
- William C. Martin
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Application
Gypsum Wallboard and Method of Making Same
- Publication number 20090123727
- Publication date May 14, 2009
- NATIONAL GYPSUM PROPERTIES, LLC
- William C. Martin
- B28 - WORKING CEMENT, CLAY, OR STONE