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Herbert M. Barrett received US Patent No. 3,356,777 on December 5, 1967, filed August 10, 1964. It was assigned to Phillips Petroleum Co.
The patent's description opens:
This invention relates to sealing leaks in buried or otherwise inaccessible conduits such as pipe lines.
- Author
- Herbert M. Barrett
- Published by
- US Patent Office
- Series
- US Patent No. 3,356,777
- Date
- December 5, 1967
- Library no.
- ACL Doc 23016 · asbestosclaims.law/library/23016
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 6 pages · 685 KB
Where it was listed
- Asbestos, January 1968, in its patents department (the year's issues)
Cited on this site
Cite this document
Herbert M. Barrett. “Method and means for sealing leaks in buried conduits (US Patent 3,356,777, 1967).” December 5, 1967. US Patent No. 3,356,777. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23016. https://asbestosclaims.law/library/23016.
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