Granted Patent
Utility
US 4,778,914 · App. 06/831,061
Chemical intermediates
Inventors:
David Cartwright, David J. Collins
Patented Case
View Patent ↗
Granted: Oct 18, 1988
Filed: Feb 19, 1986
Inventors
David Cartwright
David J. Collins
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.