Granted Patent
Utility
US 4,251,637 · App. 06/075,437
Tertiary amino substituted oxazolidines as polyisocyanurate catalysts
Inventors:
Edward E. McEntire, Robert L. Zimmerman, Howard P. Klein
Patented Case
View Patent ↗
Granted: Feb 17, 1981
Filed: Sep 13, 1979
Inventors
Edward E. McEntire
Robert L. Zimmerman
Howard P. Klein
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.