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David B. Pall and Cyril A. Keedwell received US Patent No. 3,353,682 on November 21, 1967, filed February 28, 1966.
The patent's description opens:
This invention relates to microporous fluid-permeable fibrous materials such as filters having at least two integrally assoicated fibrous layers; and to a process for preparing such materials, characterized by high permeability to fiuids, by forming the layers from the same dispersion of fibrous material.
- Author
- David B. Pall; Cyril A. Keedwell
- Published by
- US Patent Office
- Series
- US Patent No. 3,353,682
- Date
- November 21, 1967
- Library no.
- ACL Doc 22358 · asbestosclaims.law/library/22358
- Rights
- US government work, in the public domain.
Read or download
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Where it was listed
- Asbestos, January 1968, in its patents department (the year's issues)
Cited on this site
Cite this document
David B. Pall, Cyril A. Keedwell. “Fluid-permeable fibrous multilayer materials and process of making the same (US Patent 3,353,682, 1967).” November 21, 1967. US Patent No. 3,353,682. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22358. https://asbestosclaims.law/library/22358.
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