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Patent US3242371A successfully refreshed from Google Patents.
US3242371A
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Hollow-cathode discharge lamp for emission of atomic resonance lines
Assignee: Hitachi Ltd
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Filing: 1963-03-27
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Granted: 1966-03-22
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Expires: 1983-03-27
Abstract
No abstract record available.
Inventors
- 👤 Sugawara Masao
- 👤 Okagaki Hiroshi
- 👤 Ikuta Yasushi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:08
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
59 words
A HOLLOW CATHODE DISCHARGE TUBE FOR EMISSION OF ATOMIC RESONANCE LINES COMPRISING A HOLLOW CATHODE; A PROTECTIVE CONTAINER OF HEAT-RESISTANT AND ELECTRICALLY INSULATING QUALITY, HAVING AN OPEN AND A CLOSED END AND A CONICAL FIN ABOUT THE PERIPHERY OF SAID CLOSED END; SAID CONTAINER TIGHTLY COVERING THE OUTER PERIPHERY OF SAID CATHODE; A SUPPORTING CYLINDER OPPOSITE THE OPEN END
Claim 2
Dependent Claim
59 words
A HOLLOW CATHODE DISCHARGE TUBE FOR EMISSION OF ATOMIC RESONANCE LINES COMPRISING A HOLLOW CATHODE; A PROTECTIVE CONTAINER OF HEAT-RESISTANT AND ELECTRICALLY INSULATING QUALITY, HAVING AN OPEN AND A CLOSED END AND A CONICAL FIN ABOUT THE PERIPHERY OF SAID CLOSED END; SAID CONTAINER TIGHTLY COVERING THE OUTER PERIPHERY OF SAID CATHODE; A SUPPORTING CYLINDER OPPOSITE THE OPEN END
References Cited (Backward Citations)
US2445679A
Cited
US2605438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |