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George Christenson received US Patent No. 2,218,638 on October 22, 1940, filed July 21, 1938. It was assigned to Johns Manville.
The patent's description opens (from the scanned text):
The invention is. more particularly concerned-with an improved packing to beemployed in cylinderpiston assemblies, constructed and arranged to insure against loss of pressure throughthe materialof thepacking and to provide an eflicient 10 seal between the piston and the cylinder walls.
- Author
- George Christenson
- Published by
- US Patent Office
- Series
- US Patent No. 2,218,638
- Date
- October 22, 1940
- Library no.
- ACL Doc 23274 · asbestosclaims.law/library/23274
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 4 pages · 482 KB
Where it was listed
- Asbestos, November 1940, in its patents department (the year's issues)
Cite this document
George Christenson. “Packing (US Patent 2,218,638, 1940).” October 22, 1940. US Patent No. 2,218,638. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23274. https://asbestosclaims.law/library/23274.
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