Patent US3086147A successfully refreshed from Google Patents.
US3086147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame detector circuit
Assignee: Penn Controls Inc
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Filing: 1960-06-06
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Granted: 1963-04-16
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Expires: 1980-06-06
Abstract
No abstract record available.
Inventors
- 👤 Richard T Pounds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:42
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23N5/082; F23N2229/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A CONTROL COMPRISING A RESISTANCE TYPE PHOTOCELL, A SENSING CIRCUIT INCLUDING SAID PHOTOCELL AND A RESISTOR ADAPTED TO BE CONNECTED IN SERIES ACROSS A SOURCE OF ELECTRICAL ALTERNATING CURRENT, A RELAY HAVING A COIL, A RECTIFIER AND A TRANSISTOR HAVING AN OUTPUT CIRCUIT ADAPTED TO BE CONNECTED IN SERIES WITH SAID COIL AND SAID RECTIFIER ACROSS
Claim 2
Dependent Claim
56 words
A CONTROL COMPRISING A RESISTANCE TYPE PHOTOCELL, A SENSING CIRCUIT INCLUDING SAID PHOTOCELL AND A RESISTOR ADAPTED TO BE CONNECTED IN SERIES ACROSS A SOURCE OF ELECTRICAL ALTERNATING CURRENT, A RELAY HAVING A COIL, A RECTIFIER AND A TRANSISTOR HAVING AN OUTPUT CIRCUIT ADAPTED TO BE CONNECTED IN SERIES WITH SAID COIL AND SAID RECTIFIER ACROSS
References Cited (Backward Citations)
US2466634A
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US2696874A
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US2692962A
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US2884588A
Cited
US2807758A
Cited
US2958811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |