Granted Patent
Utility
US 4,886,706 · App. 07/024,644
Fibrous polyacrylonitrile reinforcing mixture for friction product applications, and method of making same
Inventors:
Hughey A. Rush, Billy B. Hibbard, Johnson L. Pursoo, John W. Lindsay, Thomas E. Smith, Kenneth Golden Harper, MIchael V. Tullos, James E. Davis
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: Mar 11, 1987
Inventors
Hughey A. Rush
Billy B. Hibbard
Johnson L. Pursoo
John W. Lindsay
Thomas E. Smith
Kenneth Golden Harper
MIchael V. Tullos
James E. Davis
Assignee (at issue)
BASF SE
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.