Granted Patent
Utility
US 4,976,884 · App. 07/409,066
Heat resistant composition processable by wet spinning
Inventors:
Pierre Delvaux, Normand Lesmerises
Patented Case
View Patent ↗
Granted: Dec 11, 1990
Filed: Sep 19, 1989
Inventors
Pierre Delvaux
Normand Lesmerises
Assignee (at issue)
Ceram SNA Inc.
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.