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David Weston and Arthur R. Macpherson received US Patent No. 2,803,346 on August 20, 1957, filed May 25, 1954.
The patent's description opens (from the scanned text):
This invention relates to a method and apparatus for classifying dry particulate material into a fraction made up of particles having a relatively high surface-weight ratio and one where the particles have a relatively low surface-weight ratio.
- Author
- David Weston; Arthur R. Macpherson
- Published by
- US Patent Office
- Series
- US Patent No. 2,803,346
- Date
- August 20, 1957
- Library no.
- ACL Doc 23223 · asbestosclaims.law/library/23223
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 6 pages · 557 KB
Where it was listed
- Asbestos, October 1957, in its patents department (the year's issues)
Cite this document
David Weston, Arthur R. Macpherson. “Movable bed stratifier with constant pneumatic current (US Patent 2,803,346, 1957).” August 20, 1957. US Patent No. 2,803,346. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23223. https://asbestosclaims.law/library/23223.
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