Granted Patent
Utility
US 4,847,343 · App. 07/166,501
Heat-resistant maleimido copolymers
Inventors:
Pascal Barthelemy, Yves Camberlin
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Mar 10, 1988
Inventors
Pascal Barthelemy
Yves Camberlin
Assignee (at issue)
RHONE-POULENC CHIMIE
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.