Granted Patent
Utility
US 4,549,907 · App. 06/684,330
Thixotropic aqueous solutions containing a crosslinked polygalactomannan gum
Inventor:
Rachel S. Kohn
Patented Case
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Granted: Oct 29, 1985
Filed: Dec 20, 1984
Inventor
Rachel S. Kohn
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.