Granted Patent
Utility
US 5,871,846 · App. 08/827,578
Silane-treated clay production method, silane-treated clay and composition containing same
Inventors:
Gary M. Freeman, Carl J. Marshall, Jr., Walter O. Lackey, Masao Onizawa
Patented Case
View Patent ↗
Granted: Feb 16, 1999
Filed: Mar 28, 1997
Inventors
Gary M. Freeman
Carl J. Marshall, Jr.
Walter O. Lackey
Masao Onizawa
Assignees (at issue)
J.M. Huber Corporation
Sanyo Trading Company, Ltd.
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.