Granted Patent
Utility
US 4,880,924 · App. 06/847,639
Novel compounds and use thereof in selective cyclization process
Inventors:
James V. Peck, Gevork Minaskanian
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Apr 3, 1986
Inventors
James V. Peck
Gevork Minaskanian
Assignee (at issue)
Nelson Research & Development Company
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.