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Rowland S. Hartzell and Gene Gerek received US Patent No. 3,522,140 on July 28, 1970, filed March 29, 1968. It was assigned to PPG Industries Inc.
- Author
- Rowland S. Hartzell; Gene Gerek
- Published by
- US Patent Office
- Series
- US Patent No. 3,522,140
- Date
- July 28, 1970
- Library no.
- ACL Doc 21829 · asbestosclaims.law/library/21829
- Rights
- US government work, in the public domain.
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Where it was listed
- Asbestos, September 1970, in its patents department (the year's issues)
Cited on this site
Cite this document
Rowland S. Hartzell, Gene Gerek. “Asbestos-foam laminates (US Patent 3,522,140, 1970).” July 28, 1970. US Patent No. 3,522,140. US Patent Office. AsbestosClaims.Law Library, ACL Doc 21829. https://asbestosclaims.law/library/21829.
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