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Charles Arthur Longbottom and Frederick Lindley Duffield received US Patent No. 1,463,399 on July 31, 1923, filed December 1, 1922.
The patent's description opens (from the scanned text):
This invention relates to the manufacture of refractory products from dolomite.
- Author
- Charles Arthur Longbottom; Frederick Lindley Duffield
- Published by
- US Patent Office
- Series
- US Patent No. 1,463,399
- Date
- July 31, 1923
- Library no.
- ACL Doc 23535 · asbestosclaims.law/library/23535
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 2 pages · 170 KB
Where it was listed
- Asbestos, October 1923, in its patents department (the year's issues)
Cite this document
Charles Arthur Longbottom, Frederick Lindley Duffield. “Refractory Products from Dolomite (US Patent 1,463,399, 1923).” July 31, 1923. US Patent No. 1,463,399. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23535. https://asbestosclaims.law/library/23535.
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