Granted Patent
Utility
US 5,624,488 · App. 08/497,241
Ultrahigh brightness calcined clay pigment, manufacture & use thereof
Inventors:
Ellen S. Forbus, Paul R. Suitch, Thomas K. Dombrowski
Patented Case
View Patent ↗
Granted: Apr 29, 1997
Filed: Jun 30, 1995
Inventors
Ellen S. Forbus
Paul R. Suitch
Thomas K. Dombrowski
Assignee (at issue)
Engelhard 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.