Granted Patent
Utility
US 5,154,767 · App. 07/643,885
Low brightness functional pigment from process by-product
Inventors:
Albert C. Kunkle, Robert E. Hardy, Bobby R. Skipper
Patented Case
View Patent ↗
Granted: Oct 13, 1992
Filed: Jan 18, 1991
Inventors
Albert C. Kunkle
Robert E. Hardy
Bobby R. Skipper
Assignee (at issue)
J.M. Huber 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.