Granted Patent
Utility
US 4,523,010 · App. 06/621,328
Dihydroxypropyl mixed ether derivatives of cellulose
Inventors:
Carl A. Lukach, Thomas G. Majewicz, Albert R. Reid
Patented Case
View Patent ↗
Granted: Jun 11, 1985
Filed: Jun 15, 1984
Inventors
Carl A. Lukach
Thomas G. Majewicz
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.