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Julie Chi-Sun Yang received US Patent No. 3,933,515 on January 20, 1976, filed September 6, 1974. It was assigned to Johns Manville Corp.
The patent's abstract:
A thermal shock resisting asbestos-cement composition is prepared by adding a finely divided porosity increasing additive as a partial or complete replacement for silica flour in an asbestos-cement composition containing asbestos fibers, portland cement, and silica flour. The composition is shaped and cured to form the final thermal shock resistant product.
- Author
- Julie Chi-Sun Yang
- Published by
- US Patent and Trademark Office
- Series
- US Patent No. 3,933,515
- Date
- January 20, 1976
- Library no.
- ACL Doc 23762 · asbestosclaims.law/library/23762
- Rights
- US government work, in the public domain.
Read or download
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Where it was listed
- Asbestos, June 1976, in its patents department (the year's issues)
Cited on this site
Cite this document
Julie Chi-Sun Yang. “Thermal shock resistant asbestos-cement compositions and their preparation (US Patent 3,933,515, 1976).” January 20, 1976. US Patent No. 3,933,515. US Patent and Trademark Office. AsbestosClaims.Law Library, ACL Doc 23762. https://asbestosclaims.law/library/23762.
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