Granted Patent
Utility
US 4,746,691 · App. 07/004,676
Method of pigmenting water-absorbable plastics
Inventor:
Ari Fuhrman
Patented Case
View Patent ↗
Granted: May 24, 1988
Filed: Jan 20, 1987
Inventor
Ari Fuhrman
Assignee (at issue)
Color Optics, Ltd.
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.