Granted Patent
Utility
US 5,385,239 · App. 07/875,792
Low brightness functional pigment from process by-product
Inventors:
Albert C. Kunkle, Robert E. Hardy, Bobby R. Skipper
Patented Case
View Patent ↗
Granted: Jan 31, 1995
Filed: Apr 27, 1992
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.