Granted Patent
Utility
US 5,466,805 · App. 08/348,510
Perinone dyestuffs for bulk dyeing of plastics
Inventor:
Peter Roschger
Patented Case
View Patent ↗
Granted: Nov 14, 1995
Filed: Dec 1, 1994
Inventor
Peter Roschger
Assignee (at issue)
Bayer Aktiengesellschaft
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.