Granted Patent
Utility
US 4,681,686 · App. 06/753,510
Cotelomer compounds
Inventors:
Norman Richardson, Brian Holt, Barry Cook
Patented Case
View Patent ↗
Granted: Jul 21, 1987
Filed: Jul 10, 1985
Inventors
Norman Richardson
Brian Holt
Barry Cook
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.