Granted Patent
Utility
US 4,347,261 · App. 06/171,674
Process for preparation of algin or pectin gels
Inventors:
Ian A. Challen, Sandra East, George R. Sanderson
Patented Case
View Patent ↗
Granted: Aug 31, 1982
Filed: Jul 24, 1980
Inventors
Ian A. Challen
Sandra East
George R. Sanderson
Assignee (at issue)
International Octrooi Maatischappit Octropa B.V.
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.