Granted Patent
Utility
US 4,415,701 · App. 06/434,144
Water soluble thickeners
Inventor:
Barry J. Bauer
Patented Case
View Patent ↗
Granted: Nov 15, 1983
Filed: Oct 12, 1982
Inventor
Barry J. Bauer
Assignee (at issue)
Celanese GmbH
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.