Granted Patent
Utility
US 4,302,340 · App. 06/064,656
Flame retardant polyol compositions and their preparation
Inventors:
Stanley R. Sandler, Mabel Chen
Patented Case
View Patent ↗
Granted: Nov 24, 1981
Filed: Aug 8, 1979
Inventors
Stanley R. Sandler
Mabel Chen
Assignee (at issue)
Pennwalt Corporation
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.