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Richard V. Mattison received US Patent No. 1,678,345 on July 24, 1928, filed June 25, 1921.
The patent's description opens (from the scanned text):
This invention relates to artificial prod ucts of the general character of millboard, draulic cement, fibrous material and one or. more alkaline earth carbonates or hydrates or a mixture of the two, and in the presence of water, work this mixture upon a millboard machine to form sheets or plates, and then beforethe cement sets subject the sheets or plates to high pressure.
- Author
- Richard V. Mattison
- Published by
- US Patent Office
- Series
- US Patent No. 1,678,345
- Date
- July 24, 1928
- Library no.
- ACL Doc 23181 · asbestosclaims.law/library/23181
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 2 pages · 185 KB
Where it was listed
- Asbestos, October 1928, in its patents department (the year's issues)
Cite this document
Richard V. Mattison. “Millboard Product and Process (US Patent 1,678,345, 1928).” July 24, 1928. US Patent No. 1,678,345. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23181. https://asbestosclaims.law/library/23181.
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