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John W. Jordan, Richard E. Offeman and Donald J. Weintritt received US Patent No. 2,995,514 on August 8, 1961, filed April 29, 1957. It was assigned to Nat Lead Co.
The patent's description opens:
This invention relates to drilling fluids, particularly oilbase drilling fluids as used in the rotary method of drilling oil and gas wells.
- Author
- John W. Jordan; Richard E. Offeman; Donald J. Weintritt
- Published by
- US Patent Office
- Series
- US Patent No. 2,995,514
- Date
- August 8, 1961
- Library no.
- ACL Doc 23248 · asbestosclaims.law/library/23248
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 5 pages · 585 KB
Where it was listed
- Asbestos, September 1961, in its patents department (the year's issues)
Cited on this site
Cite this document
John W. Jordan, Richard E. Offeman, Donald J. Weintritt. “Oil base drilling fluids (US Patent 2,995,514, 1961).” August 8, 1961. US Patent No. 2,995,514. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23248. https://asbestosclaims.law/library/23248.
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