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US2830190A
Expired / Lapsed
US
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Radioactive source
Assignee: Tracerlab Inc
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Filing: 1954-02-05
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Granted: 1958-04-08
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Expires: 1974-02-05
Abstract
No abstract record available.
Inventors
- 👤 Karp William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:56
CPC Classifications
G; G21; G21G; G21G4/00; G21G4/04; G21G4/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
133 words
A RADIOACTIVE SOURCE COMPRISING A CYLINDRICAL OUTER CONTAINER FORMED OF A MAGNETIC MATERIAL AND HAVING A CLOSED END AND AN OPEN END, A CUP-LIKE CONTAINER HAVING ITS BOTTOM FORMED OF POROUS STAINLESS STEEL, A DEPOSIT OF RADIOACTIVE SALT FILLING SAID CUP-LIKE CONTAINER, SAID CUPLIKE CONTAINER BEING DISPOSED WITHIN SAID OUTER CONTAINER WITH SAID RADIOACTIVE SALT DISPOSED ADJACENT THE CLOSED END OF SAID OUTER CONTAINER, A CLOSURE CAP HERMETICALLY SEALED IN THE OPEN END OF SAID OUTER CONTAINER, AND A SPACER PLUG HAVING AN OPENING THEREIN DISPOSED BETWEEN SAID CLOSURE CAP AND SAID CUP-LIKE CONTAINER, SAID SPACER PLUG BEING FORMED OF A MATERIAL ADAPTED TO REACT WITH ANY GAS THAT MAY BE LIBERATED FROM SAID RADIOACTIVE SALT AND THE OPENING THEREIN BEING PROVIDED TO PREVENT THE BUILD-UP OF GAS PRESSURE WITHIN SAID OUTER CONTAINER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |