US3244892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light sensitive lamp control circuit
Assignee: Individual
•
Filing: 1961-12-11
•
Granted: 1966-04-05
•
Expires: 1981-12-11
Abstract
No abstract record available.
Inventors
- 👤 Robert L Seidler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:36
CPC Classifications
H; H05; H05B; H05B39/00; H05B39/09; H05B39/10; H05B39/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A LIGHT SENSITIVE CIRCUIT COMPRISING; A PHOTOCONDUCTIVE CELL CONNECTED IN SERIES WITH A SOURCE OF DIRECT CURRENT FOR PROVIDING CURRENT THERETHROUGH, A FIRST TRANSISTOR INCLUDING A COLLECTOR, A BASE, AND AN EMITTER, SAID COLLECTOR CONNECTED TO A SOURCE OF POSITIVE VOLTAGE IN SERIES WITH A FIRST RESISTOR, AND SAID EMITTER CONNECTED TO THE NEGATIVE TERMINALS OF SAID DIRECT CURRENT SOURCE; A SECOND TRANSISTOR INCLUDING A COLLECTOR, A BASE, AND AN EMITTER, SAID SECOND COLLECTOR CONNECTED TO THE SOURCE OF POSITIVE VOLTAGE IN SERIES WITH A SECOND RESISTOR, SAID SECOND EMITTER CONNECTED TO THE NEGATIVE TERMINAL OF THE DIRECT CURRENT SOURCE, A FIRST VOLTAGE DIVIDER COMPRISING A FIRST PLURALITY OF SERIES RESISTORS CONNECTED BETWEEN THE COLLECTOR OF THE FIRST TRANSISTOR AND THE NEGATIVE TERMINAL, A SECOND VOLTAGE DIVIDER COMPRISING A SECOND PLURALITY OF SERIES RESISTORS CONNECTED BETWEEN THE COLLECTOR OF THE SECOND TRANSISTOR AND THE NEGATIVE TERMINAL, A CONNECTION BETWEEN THE BASE OF THE FIRST TRANSISTOR AND A FIRST MID-POINT ON THE SECOND VOLTAGE DI-
Claim 2
Dependent Claim
164 words
A LIGHT SENSITIVE CIRCUIT COMPRISING; A PHOTOCONDUCTIVE CELL CONNECTED IN SERIES WITH A SOURCE OF DIRECT CURRENT FOR PROVIDING CURRENT THERETHROUGH, A FIRST TRANSISTOR INCLUDING A COLLECTOR, A BASE, AND AN EMITTER, SAID COLLECTOR CONNECTED TO A SOURCE OF POSITIVE VOLTAGE IN SERIES WITH A FIRST RESISTOR, AND SAID EMITTER CONNECTED TO THE NEGATIVE TERMINALS OF SAID DIRECT CURRENT SOURCE; A SECOND TRANSISTOR INCLUDING A COLLECTOR, A BASE, AND AN EMITTER, SAID SECOND COLLECTOR CONNECTED TO THE SOURCE OF POSITIVE VOLTAGE IN SERIES WITH A SECOND RESISTOR, SAID SECOND EMITTER CONNECTED TO THE NEGATIVE TERMINAL OF THE DIRECT CURRENT SOURCE, A FIRST VOLTAGE DIVIDER COMPRISING A FIRST PLURALITY OF SERIES RESISTORS CONNECTED BETWEEN THE COLLECTOR OF THE FIRST TRANSISTOR AND THE NEGATIVE TERMINAL, A SECOND VOLTAGE DIVIDER COMPRISING A SECOND PLURALITY OF SERIES RESISTORS CONNECTED BETWEEN THE COLLECTOR OF THE SECOND TRANSISTOR AND THE NEGATIVE TERMINAL, A CONNECTION BETWEEN THE BASE OF THE FIRST TRANSISTOR AND A FIRST MID-POINT ON THE SECOND VOLTAGE DI-
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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |