Granted Patent
Utility
US 4,385,026 · App. 06/174,837
Removal of solvent from gels of high molecular weight crystalline polymers
Inventor:
Peter J. Barham
Patented Case
View Patent ↗
Granted: May 24, 1983
Filed: Aug 4, 1980
Inventor
Peter J. Barham
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.