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David B. Pall and Cyril A. Keedwell received US Patent No. 3,246,767 on April 19, 1966, filed August 6, 1962.
The patent's description opens:
This invention relates to microporous fluid-permeable materials such as filters and to a process for preparing such materials, characterized by high permeability to fluids, comprising a porous base having adhered thereto a microporous fibrous layer having a high voids volume, generally at least about 75%, a maximum port size less than about microns and a proportion of fibers extending outwardly from the base at an angle greater than about 30.
- Author
- David B. Pall; Cyril A. Keedwell
- Published by
- US Patent Office
- Series
- US Patent No. 3,246,767
- Date
- April 19, 1966
- Library no.
- ACL Doc 22359 · asbestosclaims.law/library/22359
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 12 pages · 1.6 MB
Where it was listed
- Asbestos, June 1966, in its patents department (the year's issues)
Cited on this site
Cite this document
David B. Pall, Cyril A. Keedwell. “Fluid-permeable materials and process of making the same (US Patent 3,246,767, 1966).” April 19, 1966. US Patent No. 3,246,767. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22359. https://asbestosclaims.law/library/22359.
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