Patent US3361925A successfully refreshed from Google Patents.
US3361925A
Expired / Lapsed
US
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Bismuth-lithium hollow cathode lamps
Assignee: Applied Biosystems Inc
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Filing: 1966-11-03
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Granted: 1968-01-02
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Expires: 1986-11-03
Abstract
No abstract record available.
Inventors
- 👤 John W Vollmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:02
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/04; H01J17/06; H01J17/066; H01J2893/00; H01J2893/0064; H01J2893/0065; H01J2893/0066
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN A HOLLOW CATHODE LAMP OF THE TYPE IN WHICH THE HOLLOW CATHODE ASSEMBLY THEREOF COMPRISES A SUBSTANTIALLY CUP-SHAPED HOLLOW CATHODE HOLDER AND AN INTERIOR COATING THEREON, SAID COATING COMPRISING A PARTICULAR METAL FOR WHICH SPECTRAL EMISSION RADIATION IS DESIRED, THE IMPROVEMENT IN WHICH: SAID METAL INTERIOR COATING COMPRISES AN ALLOY CONTAINING A SMALL QUANTITY OF LITHIUM OF BETWEEN ABOUT 2% AND 7% BY WEIGHT AND THE REST SUBSTANTIALLY BISMUTH, SAID COATING THEREFORE CONTAINING BETWEEN ABOUT 93% AND 98% BISMUTH BY WEIGHT, WHEREBY A RELATIVELY LONG-LIVED, BRIGHT SOURCE OF BISMUTH SPECTRAL RADIATION MAY BE OBTAINED AT RELATIVELY HIGH ELECTRICAL ENERGY, AND A USEFUL SOURCE OF LITHIUM SPECTRAL RADIATION IS ALSO CONCURRENTLY AVAILABLE.
Claim 2
Dependent Claim
112 words
IN A HOLLOW CATHODE LAMP OF THE TYPE IN WHICH THE HOLLOW CATHODE ASSEMBLY THEREOF COMPRISES A SUBSTANTIALLY CUP-SHAPED HOLLOW CATHODE HOLDER AND AN INTERIOR COATING THEREON, SAID COATING COMPRISING A PARTICULAR METAL FOR WHICH SPECTRAL EMISSION RADIATION IS DESIRED, THE IMPROVEMENT IN WHICH: SAID METAL INTERIOR COATING COMPRISES AN ALLOY CONTAINING A SMALL QUANTITY OF LITHIUM OF BETWEEN ABOUT 2% AND 7% BY WEIGHT AND THE REST SUBSTANTIALLY BISMUTH, SAID COATING THEREFORE CONTAINING BETWEEN ABOUT 93% AND 98% BISMUTH BY WEIGHT, WHEREBY A RELATIVELY LONG-LIVED, BRIGHT SOURCE OF BISMUTH SPECTRAL RADIATION MAY BE OBTAINED AT RELATIVELY HIGH ELECTRICAL ENERGY, AND A USEFUL SOURCE OF LITHIUM SPECTRAL RADIATION IS ALSO CONCURRENTLY AVAILABLE.
References Cited (Backward Citations)
US2840751A
Cited
US2913298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |