Granted Patent
Utility
US 4,579,667 · App. 06/669,485
Gelled aqueous compositions
Inventors:
Elliott Echt, Ronald D. Lees
Patented Case
View Patent ↗
Granted: Apr 1, 1986
Filed: Nov 7, 1984
Inventors
Elliott Echt
Ronald D. Lees
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.