Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7932308 | Modifiers for gypsum slurries and method of using them | Dennis Mark Lettkeman, Michael P. Shake, Qingxia Liu, John W. Wilson, David R. Blackburn | 2011-04-26 |
| 7776462 | Gypsum products utilizing a two-repeating unit dispersant and a method of making them | Qingxia Liu, Michael P. Shake, David R. Blackburn, John W. Wilson, Dennis Mark Lettkeman | 2010-08-17 |
| 7767019 | Gypsum products utilizing a two-repeating unit dispersant and a method for making them | Qingxia Liu, Michael P. Shake, David R. Blackburn, John W. Wilson, Dennis Mark Lettkeman | 2010-08-03 |
| 7608347 | Modifiers for gypsum slurries and method of using them | Dennis Mark Lettkeman, Michael P. Shake, Qingxia Liu, John W. Wilson, David R. Blackburn | 2009-10-27 |
| 7572328 | Fast drying gypsum products | Dennis Mark Lettkeman, Qingxia Liu, John W. Wilson, David R. Blackburn, Michael P. Shake | 2009-08-11 |
| 7572329 | Method of making a gypsum slurry with modifiers and dispersants | Qingxia Liu, David R. Blackburn, Michael P. Shake, John W. Wilson, Dennis Mark Lettkeman | 2009-08-11 |
| 6860953 | Process for manufacturing a floor covering having a foamed backing formed from recycled polymeric material | Mark L. Grizzle, Lynn E. Preston, Wallace J. Hammel, Paul D. Evans, Jr. | 2005-03-01 |