Granted Patent
Utility
US 5,208,296 · App. 07/939,245
Nitrile rubber hydrogenation
Inventors:
Garry L. Rempel, Xiang Guo
Patented Case
View Patent ↗
Granted: May 4, 1993
Filed: Sep 2, 1992
Inventors
Garry L. Rempel
Xiang Guo
Assignee (at issue)
Polysar Rubber 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.