Granted Patent
Utility
US 4,931,496 · App. 07/328,513
Damage tolerant fiber-reinforced composites based on cyanate ester/urea thermosetting composition
Inventors:
Shahid P. Qureshi, Hugh C. Gardner, Richard H. Newman-Evans
Patented Case
View Patent ↗
Granted: Jun 5, 1990
Filed: Mar 24, 1989
Inventors
Shahid P. Qureshi
Hugh C. Gardner
Richard H. Newman-Evans
Assignee (at issue)
Amoco 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.