Granted Patent
Utility
US 4,286,072 · App. 06/170,459
Novel polyisocyanurate catalysts
Inventors:
Edward E. McEntire, Robert L. Zimmerman
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: Jul 21, 1980
Inventors
Edward E. McEntire
Robert L. Zimmerman
Assignee (at issue)
Texaco Development 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.