Granted Patent
Utility
US 4,647,672 · App. 06/749,081
Ascorbate 2-polyphosphate esters and method of making same
Inventors:
Paul A. Seib, Ming-Long Liao
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Jun 25, 1985
Inventors
Paul A. Seib
Ming-Long Liao
Assignee (at issue)
Kansas State University Research Foundation
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.