Granted Patent
Utility
US 4,152,349 · App. 05/880,286
Polyisocyanate compositions
Inventor:
Warren J. Rabourn
Patented Case
View Patent ↗
Granted: May 1, 1979
Filed: Feb 22, 1978
Inventor
Warren J. Rabourn
Assignee (at issue)
The Upjohn Co.
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.