Granted Patent
Utility
US 4,269,754 · App. 06/058,899
Phenolic resin particles and processes for their production and friction elements containing same
Inventors:
Edward J. Lang, Michael G. Dubenitz
Patented Case
View Patent ↗
Granted: May 26, 1981
Filed: Jul 19, 1979
Inventors
Edward J. Lang
Michael G. Dubenitz
Assignee (at issue)
Hooker Chemicals & Plastics 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.