Granted Patent
Utility
US 4,954,561 · App. 07/373,925
Stabilizers for polymer/polyols
Inventors:
Richard M. Gerkin, John F. Timberlake
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Jun 30, 1989
Inventors
Richard M. Gerkin
John F. Timberlake
Assignee (at issue)
Union Carbide Chemicals & Plastics
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.