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Robert G. Quinn received US Patent No. 3,307,969 on March 7, 1967, filed February 21, 1963. It was assigned to Johns Manville.
The patent's description opens:
This invention relates to friction materials, and more particularly to improved compositions for friction'ma' terials and elements, and to novel'and enhanced asbestos sheets for saturation in the manufacture of the same.v 7 It is a'primary object of this invention to provide a novel composition or material havinga high and uniform coefficient of friction and low wear rate without a corresponding increased degree of wear on coacting metal surfaces such as brake drums; clutch plates, pressure plates and flywheels; or automatic transmission drums or steel spacer plates.
- Author
- Robert G. Quinn
- Published by
- US Patent Office
- Series
- US Patent No. 3,307,969
- Date
- March 7, 1967
- Library no.
- ACL Doc 22474 · asbestosclaims.law/library/22474
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 9 pages · 859 KB
Where it was listed
- Asbestos, April 1967, in its patents department (the year's issues)
Cite this document
Robert G. Quinn. “Friction material (US Patent 3,307,969, 1967).” March 7, 1967. US Patent No. 3,307,969. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22474. https://asbestosclaims.law/library/22474.
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