Granted Patent
Utility
US 4,211,681 · App. 05/934,265
Poly(ethylene oxide) compositions
Inventors:
David B. Braun, Stephen Drap
Patented Case
View Patent ↗
Granted: Jul 8, 1980
Filed: Aug 16, 1978
Inventors
David B. Braun
Stephen Drap
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.