Granted Patent
Utility
US 5,074,911 · App. 07/544,282
Heterocyclic thione
Inventors:
Peter W. Austin, Peter M. Quan, Peter A. Tasker, Derek Thorp
Patented Case
View Patent ↗
Granted: Dec 24, 1991
Filed: Jun 26, 1990
Inventors
Peter W. Austin
Peter M. Quan
Peter A. Tasker
Derek Thorp
Assignees (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
Nerco, Inc.
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.