Granted Patent
Utility
US 4,374,641 · App. 06/156,716
Polymeric color concentrates for thermoplastic polymeric materials
Inventor:
Dominick A. Burlone
Patented Case
View Patent ↗
Granted: Feb 22, 1983
Filed: Jun 5, 1980
Inventor
Dominick A. Burlone
Assignee (at issue)
Badische Corporation
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.