Granted Patent
Utility
US 5,408,028 · App. 07/994,922
Copolymers of polyaspartic acid and polycarboxylic acids and polyamines
Inventors:
Louis L. Wood, Gary J. Calton
Patented Case
View Patent ↗
Granted: Apr 18, 1995
Filed: Dec 22, 1992
Inventors
Louis L. Wood
Gary J. Calton
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.