Granted Patent
Utility
US 4,388,452 · App. 06/312,063
Olefin-acrylonitrile copolymers and uses thereof
Inventors:
Michael I. Naiman, Rudolf S. Buriks
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Oct 16, 1981
Inventors
Michael I. Naiman
Rudolf S. Buriks
Assignee (at issue)
Petrolite 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.