Granted Patent
Utility
US 4,321,263 · App. 06/207,600
Psyllium compositions
Inventors:
David R. Powell, Vithal K. Patel
Patented Case
View Patent ↗
Granted: Mar 23, 1982
Filed: Nov 17, 1980
Inventors
David R. Powell
Vithal K. Patel
Assignee (at issue)
Rowell Laboratories
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.