Granted Patent
Utility
US 4,290,765 · App. 05/969,594
Polyoxyalkylene polycarboxylate esters and a method of treating polyester fabric
Inventor:
Stanley R. Sandler
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Dec 14, 1978
Inventor
Stanley R. Sandler
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.