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John C. Checko and Harold Umansky received US Patent No. 3,522,069 on July 28, 1970, filed June 1, 1967. It was assigned to Mearl Corp.
The patent's description opens:
This invention relates to a method for the preparation and application of a foamed magnesia cement, and more particularly to the preparation and application of such cements of the magnesium oxysulfate or magnesium oxychloride types, which cements are useful as sprayedon freproofing materials for the protection of structural steel and other members.
- Author
- John C. Checko; Harold Umansky
- Published by
- US Patent Office
- Series
- US Patent No. 3,522,069
- Date
- July 28, 1970
- Library no.
- ACL Doc 23037 · asbestosclaims.law/library/23037
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 6 pages · 533 KB
Where it was listed
- Asbestos, September 1970, in its patents department (the year's issues)
Cite this document
John C. Checko, Harold Umansky. “Method for the preparation and application of foamed magnesia cements (US Patent 3,522,069, 1970).” July 28, 1970. US Patent No. 3,522,069. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23037. https://asbestosclaims.law/library/23037.
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