Granted Patent
Utility
US 4,126,741 · App. 05/905,654
High-modulus polyisocyanurate elastomers
Inventors:
Peter S. Carleton, James H. Ewen, Harold E. Reymore, Jr.
Patented Case
View Patent ↗
Granted: Nov 21, 1978
Filed: May 15, 1978
Inventors
Peter S. Carleton
James H. Ewen
Harold E. Reymore, Jr.
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.