Granted Patent
Utility
US 4,293,475 · App. 06/186,890
Pigment dispersions for surface-coating compositions and surface-coating compositions containing same
Inventor:
Henri Sidi
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: Sep 12, 1980
Inventor
Henri Sidi
Assignee (at issue)
Tenneco Chemicals, Inc.
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.