Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10662114 | Ultra-light cementitious compositions and related methods | Dennis Mark Lettkeman, John W. Wilson, William Kelly Bedwell, Gary F. Miller | 2020-05-26 |
| 10260241 | Resilient wallboard mounting channel accommodating standard fasteners | Dennis Mark Lettkeman, Peter A. MacDonald, Brett Fleury, Randy Mullet | 2019-04-16 |
| 9975808 | Ultra-light cementitious compositions and related methods | Dennis Mark Lettkeman, John W. Wilson, William Kelly Bedwell, Gary F. Miller | 2018-05-22 |
| 9944556 | Compositions with synthetic gypsum and methods | Dennis Mark Lettkeman, John W. Wilson, Mike L. Cloud, Brian K. Ball, Doug Blackburn | 2018-04-17 |
| 9708220 | Cementitious patch compositions and methods | Dennis Mark Lettkeman, John W. Wilson, William Kelly Bedwell | 2017-07-18 |
| 9346996 | Oil well cementing products with synthetic gypsum and methods | Dennis Mark Lettkeman, John W. Wilson, Doug Blackburn, Brian K. Ball, Mike L. Cloud | 2016-05-24 |
| 8898994 | Method for sealing wood subfloors | Dennis Albert Socha | 2014-12-02 |
| 8343273 | Method of modifying beta stucco using diethylene-triamine-pentaacetic acid | Dennis Mark Lettkeman, Michael L. Cloud, John W. Wilson | 2013-01-01 |
| 7754007 | Gypsum mixtures for forming solids | Dennis Mark Lettkeman, John W. Wilson, Brian K. Ball | 2010-07-13 |
| 7516909 | Continuous slurry dispenser apparatus | James E. Messer, Dennis Mark Lettkeman, Salvatore C. Immordino, Timothy Ross | 2009-04-14 |
| 7374611 | Sprayable machinable media | Dennis Mark Lettkeman, Eldon L. Whiteside, Salvatore C. Immordino | 2008-05-20 |
| 7338990 | High molecular weight additives for calcined gypsum and cementitious compositions | Dennis Mark Lettkeman, William Kelly Bedwell, Eldon L. Whiteside | 2008-03-04 |
| 7056964 | High strength flooring compositions | Dennis Mark Lettkeman, Eldon L. Whiteside, William Kelly Bedwell, Sharon Meiseman | 2006-06-06 |
| 6355099 | Plaster mixture for forming a machinable composition | Salvatore C. Immordino | 2002-03-12 |
| 6273345 | High performance slurry spray machine | James E. Messer, Salvatore C. Immordino, Michael J. Porter, William G. Rector, Timothy Ross | 2001-08-14 |