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Frank J. Koehne received US Patent No. 2,460,938 on February 8, 1949, filed August 5, 1944.
The patent's description opens (from the scanned text):
This invention relates to the opening and cleaning of asbestos and similar iibrous materials, concerned with improvements in method and apparatus whereby asbestos may be simultaneously opened and cleaned to segregate the fibers and fine and coarse impurities including dust and rock particles adhering thereto Crude and partially opened asbestos fibers such y as are presently available for industrial purposes consist of rodlike bundles of. desirable iine asbestos bers or laments with which are associated substantial amounts of undesirable impurities including asbestos iines, rock gangue and dust.
- Author
- Frank J. Koehne
- Published by
- US Patent Office
- Series
- US Patent No. 2,460,938
- Date
- February 8, 1949
- Library no.
- ACL Doc 22992 · asbestosclaims.law/library/22992
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 10 pages · 1.1 MB
Where it was listed
- Asbestos, April 1949, in its patents department (the year's issues)
Cite this document
Frank J. Koehne. “Method and Apparatus for Cleaning Asbestos (US Patent 2,460,938, 1949).” February 8, 1949. US Patent No. 2,460,938. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22992. https://asbestosclaims.law/library/22992.
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