Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8070895 | Water resistant cementitious article and method for preparing same | Dick C. Engbrecht, Qingxia Liu, Xuming Wang, David Paul Miller, Michael L. Bolind +3 more | 2011-12-06 |
| 7932308 | Modifiers for gypsum slurries and method of using them | Dennis Mark Lettkeman, Qingxia Liu, John W. Wilson, Brian Randall, David R. Blackburn | 2011-04-26 |