Granted Patent
Utility
US 4,481,307 · App. 06/544,301
Polyoxyalkylene/unsaturated diester reaction product for cellular foam stabilization
Inventor:
Richard L. Frentzel
Patented Case
View Patent ↗
Granted: Nov 6, 1984
Filed: Oct 21, 1983
Inventor
Richard L. Frentzel
Assignee (at issue)
Celotex 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.