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Frederick L. Pundsack received US Patent No. 3,338,667 on August 29, 1967, filed December 2, 1963. It was assigned to Johns Manville.
The patent's description opens:
This invention relates to a system of converting serpentine mineral in-to chemical products, and more particularly to an economical system or process of producing useful and valuable chemical agents from serpentine mineral wastes such as asbestos fines and low grade materials.
- Author
- Frederick L. Pundsack
- Published by
- US Patent Office
- Series
- US Patent No. 3,338,667
- Date
- August 29, 1967
- Library no.
- ACL Doc 23531 · asbestosclaims.law/library/23531
- Rights
- US government work, in the public domain.
Read or download
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Where it was listed
- Asbestos, October 1967, in its patents department (the year's issues)
Cited on this site
Cite this document
Frederick L. Pundsack. “Recovery of silica, iron oxide and magnesium carbonate from the treatment of serpentine with ammonium bisulfate (US Patent 3,338,667, 1967).” August 29, 1967. US Patent No. 3,338,667. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23531. https://asbestosclaims.law/library/23531.
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