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Patrick J. Colpoys received US Patent No. 3,891,565 on June 24, 1975, filed January 17, 1973. It was assigned to Union Carbide Corp.
The patent's abstract:
A gravel packing fluid wherein a solid particle weighting agent is suspended in a base liquid and chrysotile asbestos fibers incorporated therein so that enough weighting agent can be suspended in the base liquid to provide a packing fluid having a density greater than 11.8 ppg.
- Author
- Patrick J. Colpoys
- Published by
- US Patent and Trademark Office
- Series
- US Patent No. 3,891,565
- Date
- June 24, 1975
- Library no.
- ACL Doc 22582 · asbestosclaims.law/library/22582
- Rights
- US government work, in the public domain.
Read or download
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Where it was listed
- Asbestos, October 1975, in its patents department (the year's issues)
Cited on this site
Cite this document
Patrick J. Colpoys. “Gravel packing fluid (US Patent 3,891,565, 1975).” June 24, 1975. US Patent No. 3,891,565. US Patent and Trademark Office. AsbestosClaims.Law Library, ACL Doc 22582. https://asbestosclaims.law/library/22582.
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