Granted Patent
Utility
US 5,132,061 · App. 07/529,582
Preparing gasket compositions having expanded microspheres
Inventors:
Charles M. Lindeman, Ralph D. Andrew
Patented Case
View Patent ↗
Granted: Jul 21, 1992
Filed: May 29, 1990
Inventors
Charles M. Lindeman
Ralph D. Andrew
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.