Granted Patent
Utility
US 5,573,658 · App. 08/365,627
Low brightness functional pigment from process by-product
Inventors:
Albert C. Kunkle, Robert E. Hardy, Bobby R. Skipper
Patented Case
View Patent ↗
Granted: Nov 12, 1996
Filed: Dec 28, 1994
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.