US3242370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode glow indicator tube
Assignee: Friden Inc
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Filing: 1962-10-03
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Granted: 1966-03-22
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Expires: 1982-10-03
Abstract
No abstract record available.
Inventors
- 👤 Rankin A Milliken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:58
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J2893/00; H01J2893/0069
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
AN INDICATOR TUBE COMPRISING: A FIRST GROUP OF INDICATOR CATHODES ADAPTED TO GLOW, A SECOND GROUP OF INDICATOR CATHODES ADAPTED TO GLOW, AN ELECTRODE ASSOCIATED WITH EACH OF SAID GROUPS OF CATHODES, SAID ASSOCIATED ELECTRODES BEING AT LEAST PARTIALLY LOCATED IN THE SPACE BETWEEN SAID GROUPS OF CATHODES, SAID SPACE BEING OTHERWISE FREE OF ELECTRODES, SAID ELECTRODE ASSOCIATED WITH SAID FIRST GROUP OF CATHODES BEING ADAPTED TO EXCITE AT LEAST ONE OF SAID FIRST GROUP OF CATHODES TO GLOW AND BEING FURTHER ADAPTED TO PREVENT SAID FIRST GROUP OF CATHODES FROM GLOWING WHEN ANY OF SAID SECOND GROUP OF CATHODES IS GLOWING, AND SAID ELECTRODE ASSOCIATED WITH SAID SECOND GROUP OF CATHODES BEING ADAPTED TO EXCITE AT LEAST ONE OF SAID SECOND GROUP OF CATHODES TO GLOW AND BEING FURTHER ADAPTED TO PREVENT SAID SECOND GROUP OF CATHODES FROM GLOWING WHEN ANY ONE OF SAID FIRST GROUP OF CATHODES IS GLOWING.
Claim 2
Dependent Claim
151 words
AN INDICATOR TUBE COMPRISING: A FIRST GROUP OF INDICATOR CATHODES ADAPTED TO GLOW, A SECOND GROUP OF INDICATOR CATHODES ADAPTED TO GLOW, AN ELECTRODE ASSOCIATED WITH EACH OF SAID GROUPS OF CATHODES, SAID ASSOCIATED ELECTRODES BEING AT LEAST PARTIALLY LOCATED IN THE SPACE BETWEEN SAID GROUPS OF CATHODES, SAID SPACE BEING OTHERWISE FREE OF ELECTRODES, SAID ELECTRODE ASSOCIATED WITH SAID FIRST GROUP OF CATHODES BEING ADAPTED TO EXCITE AT LEAST ONE OF SAID FIRST GROUP OF CATHODES TO GLOW AND BEING FURTHER ADAPTED TO PREVENT SAID FIRST GROUP OF CATHODES FROM GLOWING WHEN ANY OF SAID SECOND GROUP OF CATHODES IS GLOWING, AND SAID ELECTRODE ASSOCIATED WITH SAID SECOND GROUP OF CATHODES BEING ADAPTED TO EXCITE AT LEAST ONE OF SAID SECOND GROUP OF CATHODES TO GLOW AND BEING FURTHER ADAPTED TO PREVENT SAID SECOND GROUP OF CATHODES FROM GLOWING WHEN ANY ONE OF SAID FIRST GROUP OF CATHODES IS GLOWING.
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) | 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 |