Granted Patent
Utility
US 5,489,674 · App. 08/257,609
Guar gum composition and process for making it
Inventor:
Michael Yeh
Patented Case
View Patent ↗
Granted: Feb 6, 1996
Filed: Jun 9, 1994
Inventor
Michael Yeh
Assignee (at issue)
Rhone-Poulenc, Inc.
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.