Patent US2740861A successfully refreshed from Google Patents.
US2740861A
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Glow type thermal switch
Assignee: General Electric Co
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Filing: 1954-11-29
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Granted: 1956-04-03
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Expires: 1974-11-29
Abstract
No abstract record available.
Inventors
- 👤 William H Lake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:19
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/02; H05B41/04; H05B41/06; H05B41/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A GLOW TYPE THERMAL SWITCH COMPRISING A SEALED ENVELOPE CONTAINING COOPERATING ELECTRICALLY SYMMETRICAL ELECTRODES AT LEAST ONE OF WHICH IS DEFORMABLE BY HEAT INTO ENGAGEMENT WITH ANOTHER OF SAID ELECTRODES, AND AN IONIZABLE GASEOUS ATMOSPHERE IN SAID ENVELOP COMPRISING A MIXTURE OF NEON WITH 10 TO 20 PER CENT ARGON, BY VOLUME, AT A TOTAL PRESSURE OF ABOUT 45 TO 70 MILLIMETERS.
Claim 2
Dependent Claim
62 words
A GLOW TYPE THERMAL SWITCH COMPRISING A SEALED ENVELOPE CONTAINING COOPERATING ELECTRICALLY SYMMETRICAL ELECTRODES AT LEAST ONE OF WHICH IS DEFORMABLE BY HEAT INTO ENGAGEMENT WITH ANOTHER OF SAID ELECTRODES, AND AN IONIZABLE GASEOUS ATMOSPHERE IN SAID ENVELOP COMPRISING A MIXTURE OF NEON WITH 10 TO 20 PER CENT ARGON, BY VOLUME, AT A TOTAL PRESSURE OF ABOUT 45 TO 70 MILLIMETERS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |