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Lyle Caldwell received US Patent No. 1,544,215 on June 30, 1925, filed April 2, 1924. It was assigned to Cellite Co.
The patent's description opens (from the scanned text):
This invention relates in general to COlllpositions employed as a cement, mortar or plaster, and more particularly to those compositions suitable for use in heat insulating constructions such as walls and coverings.
- Author
- Lyle Caldwell
- Published by
- US Patent Office
- Series
- US Patent No. 1,544,215
- Date
- June 30, 1925
- Library no.
- ACL Doc 22594 · asbestosclaims.law/library/22594
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 3 pages · 286 KB
Where it was listed
- Asbestos, September 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. 383, note 103
Cited on this site
Cite this document
Lyle Caldwell. “Heat Insulating Composition (US Patent 1,544,215, 1925).” June 30, 1925. US Patent No. 1,544,215. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22594. https://asbestosclaims.law/library/22594.
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