Granted Patent
Utility
US 4,509,949 · App. 06/503,957
Water thickening agents consisting of copolymers of crosslinked acrylic acids and esters
Inventors:
Chor Huang, Robert K. Schlatzer
Patented Case
View Patent ↗
Granted: Apr 9, 1985
Filed: Jun 13, 1983
Inventors
Chor Huang
Robert K. Schlatzer
Assignee (at issue)
B. F. Goodrich 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.