Granted Patent
Utility
US 4,528,334 · App. 06/605,559
Carboxylated poly(oxyalkylenes)
Inventors:
Robert J. Knopf, Kenneth C. Drake
Patented Case
View Patent ↗
Granted: Jul 9, 1985
Filed: Apr 30, 1984
Inventors
Robert J. Knopf
Kenneth C. Drake
Assignee (at issue)
Union Carbide 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.