Granted Patent
Utility
US 4,487,964 · App. 06/469,434
Method of making mixed aliphatic/aromatic polycarbodiimides
Inventors:
Stuart L. Watson, Jr., Gordon R. Humphreys
Patented Case
View Patent ↗
Granted: Dec 11, 1984
Filed: Feb 24, 1983
Inventors
Stuart L. Watson, Jr.
Gordon R. Humphreys
Assignee (at issue)
Union Carbide 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.