Granted Patent
Utility
US 5,037,508 · App. 07/500,989
Aluminum chlorohydrate or hydrotalcite treated kaolin clays for pitch control
Inventors:
Walter J. Hyder, Albert C. Kunkle, Robert M. Weaver
Patented Case
View Patent ↗
Granted: Aug 6, 1991
Filed: Mar 29, 1990
Inventors
Walter J. Hyder
Albert C. Kunkle
Robert M. Weaver
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.