Granted Patent
Utility
US 4,096,326 · App. 05/731,952
Dihydroxypropyl cellulose
Inventor:
Albert R. Reid
Patented Case
View Patent ↗
Granted: Jun 20, 1978
Filed: Oct 13, 1976
Inventor
Albert R. Reid
Assignee (at issue)
HERCULES LLC
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.