Granted Patent
Utility
US 4,902,733 · App. 07/223,577
Aqueous protective coating composition comprising 3-alkoxy-2-hydroxypropylhydroxyethylcellulose and film forming latex
Inventor:
John D. Angerer
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Jul 25, 1988
Inventor
John D. Angerer
Assignee (at issue)
Aqualon Company
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.