Granted Patent
Utility
US 5,084,539 · App. 07/572,730
Unsaturated polymers of heterocyclic olefins
Inventors:
William J. Feast, David Byran Harrison, Alan F. Gerrard, Donald Richard Randell
Patented Case
View Patent ↗
Granted: Jan 28, 1992
Filed: Aug 23, 1990
Inventors
William J. Feast
David Byran Harrison
Alan F. Gerrard
Donald Richard Randell
Assignee (at issue)
Ciba-Geigy
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.