US3086147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame detector circuit
Assignee: Penn Controls Inc
•
Filing: 1960-06-06
•
Granted: 1963-04-16
•
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 00:27
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
Cited
US2696874A
Cited
US2692962A
Cited
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 |