Granted Patent
Utility
US 5,219,986 · App. 07/783,355
Polyanhydroaspartic acid and method of dry manufacture of polymers
Inventor:
Thomas A. Cassata
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Oct 28, 1991
Inventor
Thomas A. Cassata
Assignee (at issue)
Cygnus, LLC
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.