US3229157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crucible surface ionization source
Assignee: Individual
•
Filing: 1963-09-30
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Granted: 1966-01-11
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Expires: 1983-09-30
Abstract
No abstract record available.
Inventors
- 👤 Charles M Stevens
- 👤 Andrew L Harkness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:55
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/10; H01J49/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
AN ION SOURCE COMPRISING AN ELONGATED REFRACTORY METAL CRUCIBLE HAVING A SAMPLE CONTAINING CAVITY AT ONE END THEREOF; MEANS FOR HEATING SAID ONE END OF SAID CRUCIABLE TO APPROXIMATELY 2400* K., WHEREBY THE CONTAINED SAMPLE IS VAPORIZED; A SMALL DIAMETER REFRACTORY METAL OPEN-ENDED IONIZATION TUBE HAVING A LENGTH TO INSIDE DIAMETER RATIO OF AT LEAST ABOUT 12, ONE END OF SAID TUBE EXTENDING PARTIALLY INTO SAID CAVITY SO AS TO BE SUPPORTED BY SAID CRUCIBLE AND TO HAVE ITS INTERIOR VOLUME IN COMMUNICATION WITH SAID CAVITY; AND MEANS FOR HEATING THE
Claim 2
Dependent Claim
91 words
AN ION SOURCE COMPRISING AN ELONGATED REFRACTORY METAL CRUCIBLE HAVING A SAMPLE CONTAINING CAVITY AT ONE END THEREOF; MEANS FOR HEATING SAID ONE END OF SAID CRUCIABLE TO APPROXIMATELY 2400* K., WHEREBY THE CONTAINED SAMPLE IS VAPORIZED; A SMALL DIAMETER REFRACTORY METAL OPEN-ENDED IONIZATION TUBE HAVING A LENGTH TO INSIDE DIAMETER RATIO OF AT LEAST ABOUT 12, ONE END OF SAID TUBE EXTENDING PARTIALLY INTO SAID CAVITY SO AS TO BE SUPPORTED BY SAID CRUCIBLE AND TO HAVE ITS INTERIOR VOLUME IN COMMUNICATION WITH SAID CAVITY; AND MEANS FOR HEATING THE
References Cited (Backward Citations)
FR1289265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |