Granted Patent
Utility
US 4,298,729 · App. 06/042,663
Xanthan gum-modified starches
Inventors:
Hsiung-Kuei Cheng, Peter Wintersdorff
Patented Case
View Patent ↗
Granted: Nov 3, 1981
Filed: May 25, 1979
Inventors
Hsiung-Kuei Cheng
Peter Wintersdorff
Assignee (at issue)
MERCK & CO., 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.