Granted Patent
Utility
US 6,110,439 · App. 09/033,976
Dry silica gel and process of preparation
Inventors:
Ravindra Deshpande, Lisa A. Stover
Patented Case
View Patent ↗
Granted: Aug 29, 2000
Filed: Mar 3, 1998
Inventors
Ravindra Deshpande
Lisa A. Stover
Assignee (at issue)
ARMSTRONG WORLD INDUSTRIES, INC.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.