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Albert S. Johnson received US Patent No. 2,214,904 on September 17, 1940, filed March 21, 1938.
The patent's description opens (from the scanned text):
My invention pertains to heat-insulating compounds or mixtures and it relates more particularly, but not exclusively, to insulating mix tures of a plastic character designed and adapted to be used in connection with boilers or the like to retain the heat therein, resulting in marked improvement in the economy of operation of the boilers or heaters with which it is used to cover the brick-work, concrete, or its equivalent externally.
- Author
- Albert S. Johnson
- Published by
- US Patent Office
- Series
- US Patent No. 2,214,904
- Date
- September 17, 1940
- Library no.
- ACL Doc 22653 · asbestosclaims.law/library/22653
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 2 pages · 189 KB
Where it was listed
- Asbestos, October 1940, in its patents department (the year's issues)
Cite this document
Albert S. Johnson. “Heat Insulation Material (US Patent 2,214,904, 1940).” September 17, 1940. US Patent No. 2,214,904. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22653. https://asbestosclaims.law/library/22653.
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