Patent US3122728A successfully refreshed from Google Patents.
US3122728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat detection
Assignee: Individual
•
Filing: 1959-05-25
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Granted: 1964-02-25
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Expires: 1979-05-25
Abstract
No abstract record available.
Inventors
- 👤 Jr John E Lindberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:43
CPC Classifications
G; G01; G01K; G01K3/00; G01K3/08; G01K3/14; A; A62; A62C; A62C3/00; A62C3/07; A62C3/08; C; C01; C01B; C01B3/00; C01B3/0005; C01B3/001; C01B3/0018; C01B3/0026; C01B6/00; G08; G08B; G08B17/00; G08B17/04; G08B17/06; G08B17/10; G08B17/11; G08B17/113; H; H01; H01H; H01H35/00; H01H35/24; H01H35/34; H01H35/346; H01H37/00; H01H37/02; H01H37/32; H01H37/36; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/32; Y10; Y10S; Y10S236/00; Y10S236/11; Y10T; Y10T29/00; Y10T29/49; Y10T29/49808
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A DIFFERENTIAL TEMPERATURE DETECTION SYSTEM COMPRISING A DIAPHRAGM; A HOUSING DIVIDED BY SAID DIAPHRAGM INTO FIRST AND SECOND CHAMBERS; A FIRST TUBE CONNECTED TO SAID FIRST CHAMBER AND CONTAINING A TRANSDUCING AGENT THAT RELEASES LARGE QUANTITIES OF GAS WHEN HEATED; A SECOND TUBE CONNECTED TO SAID SECOND CHAMBER AND ALSO CONTAINING A TRANSDUCING AGENT THAT RELEASES LARGE QUANTITIES OF GAS WHEN HEATED; A SWITCH IN EACH OF SAID FIRST AND SECOND CHAMBERS, EACH ACTUATED BY SAID DIAPHRAGM AS A RESULT OF THE DIFFERENCE BETWEEN THE PRESSURES IN SAID FIRST AND SECOND CHAMBERS; AND AN ELECTRICAL CIRCUIT FOR SAID SWITCHES AND ACTUATED THEREBY, SAID CIRCUIT INCLUDING AN INDICATOR ACTUATED BY SAID CIRCUIT.
Claim 2
Dependent Claim
111 words
A DIFFERENTIAL TEMPERATURE DETECTION SYSTEM COMPRISING A DIAPHRAGM; A HOUSING DIVIDED BY SAID DIAPHRAGM INTO FIRST AND SECOND CHAMBERS; A FIRST TUBE CONNECTED TO SAID FIRST CHAMBER AND CONTAINING A TRANSDUCING AGENT THAT RELEASES LARGE QUANTITIES OF GAS WHEN HEATED; A SECOND TUBE CONNECTED TO SAID SECOND CHAMBER AND ALSO CONTAINING A TRANSDUCING AGENT THAT RELEASES LARGE QUANTITIES OF GAS WHEN HEATED; A SWITCH IN EACH OF SAID FIRST AND SECOND CHAMBERS, EACH ACTUATED BY SAID DIAPHRAGM AS A RESULT OF THE DIFFERENCE BETWEEN THE PRESSURES IN SAID FIRST AND SECOND CHAMBERS; AND AN ELECTRICAL CIRCUIT FOR SAID SWITCHES AND ACTUATED THEREBY, SAID CIRCUIT INCLUDING AN INDICATOR ACTUATED BY SAID CIRCUIT.
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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) | 1967-02-24 | 1967-08-26 | 1968-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-24 | 1971-08-26 | 1972-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-24 | 1975-08-26 | 1976-02-25 | $7700.00 | Window Closed / Lapsed |