Granted Patent
Utility
US 5,266,470 · App. 07/724,517
Copolymer production
Inventors:
Peter J. Senior, Stephen H. Collins, Kenneth R. Richardson
Patented Case
View Patent ↗
Granted: Nov 30, 1993
Filed: Jun 28, 1991
Inventors
Peter J. Senior
Stephen H. Collins
Kenneth R. Richardson
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.