DL

Dennis Mark Lettkeman

UG United States Gypsum: 21 patents #15 of 432Top 4%
📍 Broken Arrow, OK: #13 of 587 inventorsTop 3%
🗺 Oklahoma: #399 of 12,736 inventorsTop 4%
Overall (All Time): #201,605 of 4,157,543Top 5%
21
Patents All Time

Issued Patents All Time

Showing 1–21 of 21 patents

Patent #TitleCo-InventorsDate
12291485 Gypsum cement compositions with aggregate stabilizers and methods for forming floor underlayment Karl Glenn Niessner, John W. Wilson, William Kelly Bedwell 2025-05-06
10662114 Ultra-light cementitious compositions and related methods John W. Wilson, William Kelly Bedwell, Gary F. Miller, Raymond A. Kaligian 2020-05-26
10260241 Resilient wallboard mounting channel accommodating standard fasteners Raymond A. Kaligian, Peter A. MacDonald, Brett Fleury, Randy Mullet 2019-04-16
10221100 Pourable compositions Michael Intorcia 2019-03-05
9975808 Ultra-light cementitious compositions and related methods John W. Wilson, William Kelly Bedwell, Gary F. Miller, Raymond A. Kaligian 2018-05-22
9944556 Compositions with synthetic gypsum and methods John W. Wilson, Mike L. Cloud, Brian K. Ball, Raymond A. Kaligian, Doug Blackburn 2018-04-17
9708220 Cementitious patch compositions and methods John W. Wilson, William Kelly Bedwell, Raymond A. Kaligian 2017-07-18
9346996 Oil well cementing products with synthetic gypsum and methods John W. Wilson, Doug Blackburn, Brian K. Ball, Raymond A. Kaligian, Mike L. Cloud 2016-05-24
8343273 Method of modifying beta stucco using diethylene-triamine-pentaacetic acid Raymond A. Kaligian, Michael L. Cloud, John W. Wilson 2013-01-01
7932308 Modifiers for gypsum slurries and method of using them Michael P. Shake, Qingxia Liu, John W. Wilson, Brian Randall, 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, Brian Randall 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, Brian Randall 2010-08-03
7754007 Gypsum mixtures for forming solids John W. Wilson, Raymond A. Kaligian, Brian K. Ball 2010-07-13
7608347 Modifiers for gypsum slurries and method of using them Michael P. Shake, Qingxia Liu, John W. Wilson, Brian Randall, David R. Blackburn 2009-10-27
7572328 Fast drying gypsum products Qingxia Liu, John W. Wilson, Brian Randall, 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, Brian Randall, John W. Wilson 2009-08-11
7516909 Continuous slurry dispenser apparatus Raymond A. Kaligian, James E. Messer, Salvatore C. Immordino, Timothy Ross 2009-04-14
7504165 High strength flooring compositions John W. Wilson, William Kelly Bedwell 2009-03-17
7374611 Sprayable machinable media Raymond A. Kaligian, Eldon L. Whiteside, Salvatore C. Immordino 2008-05-20
7338990 High molecular weight additives for calcined gypsum and cementitious compositions Raymond A. Kaligian, William Kelly Bedwell, Eldon L. Whiteside 2008-03-04
7056964 High strength flooring compositions Raymond A. Kaligian, Eldon L. Whiteside, William Kelly Bedwell, Sharon Meiseman 2006-06-06