Granted Patent
Utility
US 4,360,488 · App. 06/174,836
Removal of solvent from gels of poly(hydroxybutyrate) and shaped articles formed therefrom
Inventors:
Peter J. Barham, Alan Selwood
Patented Case
View Patent ↗
Granted: Nov 23, 1982
Filed: Aug 4, 1980
Inventors
Peter J. Barham
Alan Selwood
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.