Granted Patent
Utility
US 5,008,444 · App. 07/456,340
Process for the production of substituted acryloyloxyhydroxypropyltrialkylammonium chloride
Inventors:
William Chiang, Richard Jobbins, Michael Paul Popule
Patented Case
View Patent ↗
Granted: Apr 16, 1991
Filed: Dec 26, 1989
Inventors
William Chiang
Richard Jobbins
Michael Paul Popule
Assignee (at issue)
Polypure, 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.