Granted Patent
Utility
US 4,199,521 · App. 05/882,395
Process for producing polyhydric alcohols and derivatives
Inventors:
Leonard Kaplan, Roy L. Pruett
Patented Case
View Patent ↗
Granted: Apr 22, 1980
Filed: Mar 1, 1978
Inventors
Leonard Kaplan
Roy L. Pruett
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.