Granted Patent
Utility
US 4,994,112 · App. 07/429,195
Hydrophobically modified cellulosic thickeners for paper coating
Inventors:
Thomas G. Majewicz, Teng-Shau Young
Patented Case
View Patent ↗
Granted: Feb 19, 1991
Filed: Oct 30, 1989
Inventors
Thomas G. Majewicz
Teng-Shau Young
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.