Granted Patent
Utility
US 4,313,890 · App. 06/116,618
Polyol ester functional fluids
Inventors:
Nan S. Chu, Nye A. Clinton, Robert A. Cupper, Philip F. Wolf, Priscilla B. Stanley
Patented Case
View Patent ↗
Granted: Feb 2, 1982
Filed: Jan 29, 1980
Inventors
Nan S. Chu
Nye A. Clinton
Robert A. Cupper
Philip F. Wolf
Priscilla B. Stanley
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.