Inventor · disambiguated record
Dennis Mark Lettkeman
Also filed as: LETTKEMAN DENNIS · LETTKEMAN DENNIS M · LETTKEMAN DENNIS MARK
21 granted patents·4 pending applications·331 citations·filing 2001–2022
96Inventor score
Files withUNITED STATES GYPSUM CO24
Top patents by PatentIndex Score
25 records- 0198US7767019B2Gypsum products utilizing a two-repeating unit dispersant and a method for making themUNITED STATES GYPSUM CO·Filed 2006·Granted Aug 3, 2010·56 cites·15 claims
- 0296US10662114B2Ultra-light cementitious compositions and related methodsUNITED STATES GYPSUM CO·Filed 2018·Granted May 26, 2020·18 cites·4 claims
- 0396US7572329B2Method of making a gypsum slurry with modifiers and dispersantsUNITED STATES GYPSUM CO·Filed 2006·Granted Aug 11, 2009·47 cites·18 claims
- 0495US7932308B2Modifiers for gypsum slurries and method of using themUNITED STATES GYPSUM CO·Filed 2009·Granted Apr 26, 2011·17 cites·7 claims
- 0595US7572328B2Fast drying gypsum productsUNITED STATES GYPSUM CO·Filed 2005·Granted Aug 11, 2009·25 cites·9 claims
- 0694US8343273B1Method of modifying beta stucco using diethylene-triamine-pentaacetic acidUNITED STATES GYPSUM CO·Filed 2012·Granted Jan 1, 2013·13 cites·11 claims
- 0794US7776462B2Gypsum products utilizing a two-repeating unit dispersant and a method of making themUNITED STATES GYPSUM CO·Filed 2009·Granted Aug 17, 2010·24 cites·8 claims
- 0894US7608347B2Modifiers for gypsum slurries and method of using themUNITED STATES GYPSUM CO·Filed 2006·Granted Oct 27, 2009·17 cites·8 claims
- 0989US9708220B2Cementitious patch compositions and methodsUNITED STATES GYPSUM CO·Filed 2015·Granted Jul 18, 2017·4 cites·10 claims
- 1088US7504165B2High strength flooring compositionsUNITED STATES GYPSUM CO·Filed 2005·Granted Mar 17, 2009·12 cites·18 claims
- 1186US7516909B2Continuous slurry dispenser apparatusUNITED STATES GYPSUM CO·Filed 2005·Granted Apr 14, 2009·17 cites·18 claims
- 1285US10221100B2Pourable compositionsUNITED STATES GYPSUM CO·Filed 2017·Granted Mar 5, 2019·5 cites·16 claims
- 1385US9975808B2Ultra-light cementitious compositions and related methodsUNITED STATES GYPSUM CO·Filed 2014·Granted May 22, 2018·4 cites·13 claims
- 1481US7056964B2High strength flooring compositionsUNITED STATES GYPSUM CO·Filed 2003·Granted Jun 6, 2006·32 cites·22 claims
- 1580US7754007B2Gypsum mixtures for forming solidsUNITED STATES GYPSUM CO·Filed 2008·Granted Jul 13, 2010·6 cites·20 claims
- 1676US9944556B2Compositions with synthetic gypsum and methodsUNITED STATES GYPSUM CO·Filed 2014·Granted Apr 17, 2018·4 cites·7 claims
- 1776US9346996B1Oil well cementing products with synthetic gypsum and methodsUNITED STATES GYPSUM CO·Filed 2015·Granted May 24, 2016·3 cites·11 claims
- 1876US7338990B2High molecular weight additives for calcined gypsum and cementitious compositionsUNITED STATES GYPSUM CO·Filed 2003·Granted Mar 4, 2008·16 cites·19 claims
- 1972US10260241B2Resilient wallboard mounting channel accommodating standard fastenersUNITED STATES GYPSUM CO·Filed 2017·Granted Apr 16, 2019·6 cites·1 claims
- 2066US12291485B2Gypsum cement compositions with aggregate stabilizers and methods for forming floor underlaymentUNITED STATES GYPSUM CO·Filed 2022·Granted May 6, 2025·0 cites·19 claims
- 2158US7374611B2Sprayable machinable mediaUNITED STATES GYPSUM CO·Filed 2003·Granted May 20, 2008·5 cites·25 claims
- 2253US2006278127A1Gypsum products utilizing a two-repeating unit dispersant and a method for making themUNITED STATES GYPSUM CO·Filed 2005·Application pending·0 cites
- 2350US2006280899A1Method of making a gypsum slurry with modifiers and dispersantsUNITED STATES GYPSUM CO·Filed 2005·Application pending·0 cites
- 2446US2006280898A1Modifiers for gypsum slurries and method of using themUNITED STATES GYPSUM CO·Filed 2005·Application pending·0 cites
- 2535US2002117559A1Continuous slurry dispenser apparatusFiled 2001·Application pending·0 cites
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