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Drewsen Viggo received US Patent No. 1,628,311 on May 10, 1927, filed December 11, 1923.
The patent's description opens (from the scanned text):
This invention has been described in connection with a number of illustrative materials, proportions, conditions, temperatures, concentrations and orders of steps, to the details of which disclosure the invention is not of course to be limited, since what is claimed as new and what is desired to be secured by Letters Patent is set forth in the appended claims: 1.
- Author
- Drewsen Viggo
- Published by
- US Patent Office
- Series
- US Patent No. 1,628,311
- Date
- May 10, 1927
- Library no.
- ACL Doc 23467 · asbestosclaims.law/library/23467
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 2 pages · 149 KB
Where it was listed
- Asbestos, August 1927, in its patents department (the year's issues)
Cite this document
Drewsen Viggo. “Process of Making Magnesia and Calcium Pentasulphide (US Patent 1,628,311, 1927).” May 10, 1927. US Patent No. 1,628,311. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23467. https://asbestosclaims.law/library/23467.
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