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Clark S. Teitsworth received US Patent No. 1,520,893 on December 30, 1924, filed December 1, 1923. It was assigned to Celite Co.
The patent's description opens (from the scanned text):
The present invention is an important improvement upon the art in that I have devised a method of manufacture by which a. very small amount of binder produces a material having great natural strength and cohesion and at the same time better heat insulation ability than the natural diatomaceous earth in compacted state.
- Author
- Clark S. Teitsworth
- Published by
- US Patent Office
- Series
- US Patent No. 1,520,893
- Date
- December 30, 1924
- Library no.
- ACL Doc 23623 · asbestosclaims.law/library/23623
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 5 pages · 448 KB
Where it was listed
- Asbestos, February 1925, in its patents department (the year's issues)
- Barry Castleman, Asbestos: Medical and Legal Aspects (5th edition, 2005)
Cited by Barry Castleman
In Asbestos: Medical and Legal Aspects (5th edition, 2005), which cites it in:
- Chapter 6 (Alternatives to Asbestos Insulation), p. 376, note 42
Cited on this site
Cite this document
Clark S. Teitsworth. “Semi-refractory Heat Insulating Material and Method of Making Same (US Patent 1,520,893, 1924).” December 30, 1924. US Patent No. 1,520,893. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23623. https://asbestosclaims.law/library/23623.
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