Granted Patent
Utility
US 4,956,501 · App. 07/259,805
Polyesters having improved impact strength
Inventors:
Ronald H. Sunseri, Michael William O'Rourke
Patented Case
View Patent ↗
Granted: Sep 11, 1990
Filed: Oct 19, 1988
Inventors
Ronald H. Sunseri
Michael William O'Rourke
Assignee (at issue)
Copolymer Rubber & Chemical 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.