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Steven B. Avery received US Patent No. 2,344,959 on March 28, 1944, filed August 26, 1941. It was assigned to Ruberoid Co.
The patent's description opens (from the scanned text):
This invention relates to apparatus for the manufacture, by extrusion thrsugh a die, of pipes or tubes formed of asbestos-cer.ient, concrete, or other suitable plastic cementitious material.
- Author
- Steven B. Avery
- Published by
- US Patent Office
- Series
- US Patent No. 2,344,959
- Date
- March 28, 1944
- Library no.
- ACL Doc 21674 · asbestosclaims.law/library/21674
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 3 pages · 185 KB
Where it was listed
- Asbestos, April 1944, in its patents department (the year's issues)
Cite this document
Steven B. Avery. “Apparatus for Extrusion of Plastic Material in Tubular Form (US Patent 2,344,959, 1944).” March 28, 1944. US Patent No. 2,344,959. US Patent Office. AsbestosClaims.Law Library, ACL Doc 21674. https://asbestosclaims.law/library/21674.
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