Granted Patent
Utility
US 5,292,864 · App. 08/044,902
Decolorizing polyaspartic acid polymers
Inventors:
Louis L. Wood, Gary J. Calton
Patented Case
View Patent ↗
Granted: Mar 8, 1994
Filed: Apr 7, 1993
Inventors
Louis L. Wood
Gary J. Calton
Assignee (at issue)
SRCHEM, 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.