US2930873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glow switch
Assignee: General Electric Co
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Filing: 1957-03-25
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Granted: 1960-03-29
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Expires: 1977-03-25
Abstract
No abstract record available.
Inventors
- 👤 William H Lake
- 👤 Kastner Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:29
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/02; H05B41/04; H05B41/06; H05B41/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A GLOW SWITCH COMPRISING A SEALED ENVELOPE CONTAINING A PAIR OF COOPERATING ELECTRODES AT LEAST ONE OF WHICH IS DEFORMABLE BY HEAT INTO ENGAGEMENT WITH THE OTHER AND AN IONIZABLE GASEOUS ATMOSPHERE IN SAID ENVELOPE CONTAINING FOR THE MAJOR PART AN INERT GAS FROM THE GROUP CONSISTING OF ARGON AND NEON AND MIXTURES THEREOF AT A PRESSURE NOT EXCEEDING 100 MILLIMETERS, A TRACE OF RADIOACTIVE TRITIUM IN A CONCENTRATION PROVIDING SUFFICIENT ACTIVITY TO OVERCOME DARK EFFECT, AND A MINOR PORPORTION OF HYDROGEN IN A PERCENTAGE NOT EXCEEDING 10 PERCENT TO SERVE AS A CARRIER FOR THE TRITIUM.
Claim 2
Dependent Claim
97 words
A GLOW SWITCH COMPRISING A SEALED ENVELOPE CONTAINING A PAIR OF COOPERATING ELECTRODES AT LEAST ONE OF WHICH IS DEFORMABLE BY HEAT INTO ENGAGEMENT WITH THE OTHER AND AN IONIZABLE GASEOUS ATMOSPHERE IN SAID ENVELOPE CONTAINING FOR THE MAJOR PART AN INERT GAS FROM THE GROUP CONSISTING OF ARGON AND NEON AND MIXTURES THEREOF AT A PRESSURE NOT EXCEEDING 100 MILLIMETERS, A TRACE OF RADIOACTIVE TRITIUM IN A CONCENTRATION PROVIDING SUFFICIENT ACTIVITY TO OVERCOME DARK EFFECT, AND A MINOR PORPORTION OF HYDROGEN IN A PERCENTAGE NOT EXCEEDING 10 PERCENT TO SERVE AS A CARRIER FOR THE TRITIUM.
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) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |