Granted Patent
Utility
US 4,172,825 · App. 05/941,690
Polymer/polyols and process for production thereof
Inventors:
Edgar G. Shook, Donald W. Simroth, Russell Van Cleve, Edmund C. Steinle, Jr.
Patented Case
View Patent ↗
Granted: Oct 30, 1979
Filed: Sep 12, 1978
Inventors
Edgar G. Shook
Donald W. Simroth
Russell Van Cleve
Edmund C. Steinle, Jr.
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.