Granted Patent
Utility
US 4,125,505 · App. 05/703,022
Polymer/polyols from high ethylene oxide content polyols
Inventors:
Frank E. Critchfield, Richard M. Gerkin, Leslie E. Hawker
Patented Case
View Patent ↗
Granted: Nov 14, 1978
Filed: Jul 6, 1976
Inventors
Frank E. Critchfield
Richard M. Gerkin
Leslie E. Hawker
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.