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Dorothy H. Grunwald received US Patent No. 2,131,374 on September 27, 1938, filed August 17, 1936.
The patent's description opens (from the scanned text):
The invention relates to magnesium carbonate compositions of the type suitable for ilr sglgm urposes, and more particularly to an mproved composition of this character made from dolomitic material as the source of raw material, in which the compounds of calcium derived from the dolomitic material are not removed or separated for the purpose of providing a final product of the requisite degree of lightness, strength and insulating properties, but remain in the final product, and also to an improved process for producing such composition whereby the composition has the ...
- Author
- Dorothy H. Grunwald
- Published by
- US Patent Office
- Series
- US Patent No. 2,131,374
- Date
- September 27, 1938
- Library no.
- ACL Doc 22203 · asbestosclaims.law/library/22203
- Rights
- US government work, in the public domain.
Read or download
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Where it was listed
- Asbestos, November 1938, in its patents department (the year's issues)
- Asbestos, June 1943, in its patents department (the year's issues)
- Asbestos, July 1943, in its patents department (the year's issues)
- Asbestos, August 1943, in its patents department (the year's issues)
- Asbestos, April 1944, in its patents department (the year's issues)
- Asbestos, May 1944, in its patents department (the year's issues)
- Asbestos, July 1944, in its patents department (the year's issues)
- Asbestos, December 1944, in its patents department (the year's issues)
- Asbestos, January 1945, in its patents department (the year's issues)
- Asbestos, February 1945, in its patents department (the year's issues)
- Asbestos, May 1945, in its patents department (the year's issues)
- Asbestos, June 1945, in its patents department (the year's issues)
- Asbestos, September 1945, in its patents department (the year's issues)
Cite this document
Dorothy H. Grunwald. “Dolomitic Magnesium Carbonate (US Patent 2,131,374, 1938).” September 27, 1938. US Patent No. 2,131,374. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22203. https://asbestosclaims.law/library/22203.
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