Patent US3309610A successfully refreshed from Google Patents.
US3309610A
Expired / Lapsed
US
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Multi-layer solid state meter having electroluminescent indication, breakdown diodes and constant-current controlling elements
Assignee: North American Aviation Corp
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Filing: 1963-05-28
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Granted: 1967-03-14
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Expires: 1983-05-28
Abstract
No abstract record available.
Inventors
- 👤 Yamamoto Yujiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:26
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/40; G01R13/404; G01R13/405; H; H05; H05B; H05B33/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE COMBINATION COMPRISING A STRIP OF ELECTROLUMINESCENT MATERIAL; A PLURALITY OF CONSTANT-CURRENT-CONTROLLING MEMBERS; A PLURALITY OF DIODES HAVING DIFFERENT BREAKDOWN VOLTAGES; AND MEANS FOR SERIES-CONNECTING A DIODE, A MEMBER OF SAID PLURALITY, AND AN AREA OF SAID STRIP OF SAID ELECTROLUMINESCENT MATERIAL-WHEREBY INPUT SIGNALS OF DIFFERENT MAGNITUDES CAUSE VARIOUS PORTIONS OF SAID STRIP TO GLOW, SAID CONSTANT-CURRENT-CONTROLLING MEMBERS ACTING TO PROVIDE A COMBINATION HAVING A SUBSTANTIALLY CONSTANT INPUT IMPEDANCE.
Claim 2
Dependent Claim
69 words
THE COMBINATION COMPRISING A STRIP OF ELECTROLUMINESCENT MATERIAL; A PLURALITY OF CONSTANT-CURRENT-CONTROLLING MEMBERS; A PLURALITY OF DIODES HAVING DIFFERENT BREAKDOWN VOLTAGES; AND MEANS FOR SERIES-CONNECTING A DIODE, A MEMBER OF SAID PLURALITY, AND AN AREA OF SAID STRIP OF SAID ELECTROLUMINESCENT MATERIAL-WHEREBY INPUT SIGNALS OF DIFFERENT MAGNITUDES CAUSE VARIOUS PORTIONS OF SAID STRIP TO GLOW, SAID CONSTANT-CURRENT-CONTROLLING MEMBERS ACTING TO PROVIDE A COMBINATION HAVING A SUBSTANTIALLY CONSTANT INPUT IMPEDANCE.
References Cited (Backward Citations)
US2094645A
Cited
US2818531A
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US3149281A
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US3141107A
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US3112405A
Cited
US3134055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |