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Patent US3167657A successfully refreshed from Google Patents.
US3167657A
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Electro-optical counter circuit
Assignee: General Electric Co
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Filing: 1961-05-19
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Granted: 1965-01-26
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Expires: 1981-05-19
Abstract
No abstract record available.
Inventors
- 👤 James F Vize
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:44
CPC Classifications
H; H03; H03K; H03K23/00; H03K23/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A COUNTER CIRCUIT COMPRISING, A CONSTANT CURRENT SOURCE, A PLURALITY OF MORE THAN TWO STAGES EACH HAVING A PHOTOCONDUCTIVE DEVICE AND AN ELECTROLUMINESCENT DEVICE IN SERIES TO FORM AN ELECTRO-OPTICAL PAIR, EACH OF SAID ELECTRO-OPTICAL PAIRS ELECTRICALLY CONNECTED TO SAID CONSTANT CURRENT SOURCE IN PARALLEL WITH THE ELECTRO-OPTICAL PAIROF EACH OF THE OTHER OF SAID STAGES, EACH OF SAID ELECTROOPTICAL PAIRS HAVING A HIGH CONDUCTIVITY STATE AND A LOW CONDUCTIVITY STATE, SAID CONSTANT CURRENT SOURCE CAPABLE OF SUPPLYING SUFFICIENT CURRENT TO MAINTAIN ONLY ONE OF SAID ELECTRO-OPTICAL PAIRS IN THE HIGH CONDUCTIVITY STATE, MEANS FOR SHUNTING THE PHOTOCONDUCTIVE DEVICE IN ONE OF SAID ELECTRO-OPTICAL PAIRS WHILE SAID ONE ELECTRO-OPTICAL PAIR IS IN THE LOW CONDUCTIVITY STATE, SAID MEANS COMPRISING A PHOTOCONDUCTIVE DEVICE RESPONSIVE TO RADIATION FROM THE ELECTROLUMINESCENT DEVICE OF ONE OF SAID ELECTRO-OPTICAL PAIRS IN THE HIGH CONDUCTIVITY STATE.
Claim 2
Dependent Claim
140 words
A COUNTER CIRCUIT COMPRISING, A CONSTANT CURRENT SOURCE, A PLURALITY OF MORE THAN TWO STAGES EACH HAVING A PHOTOCONDUCTIVE DEVICE AND AN ELECTROLUMINESCENT DEVICE IN SERIES TO FORM AN ELECTRO-OPTICAL PAIR, EACH OF SAID ELECTRO-OPTICAL PAIRS ELECTRICALLY CONNECTED TO SAID CONSTANT CURRENT SOURCE IN PARALLEL WITH THE ELECTRO-OPTICAL PAIROF EACH OF THE OTHER OF SAID STAGES, EACH OF SAID ELECTROOPTICAL PAIRS HAVING A HIGH CONDUCTIVITY STATE AND A LOW CONDUCTIVITY STATE, SAID CONSTANT CURRENT SOURCE CAPABLE OF SUPPLYING SUFFICIENT CURRENT TO MAINTAIN ONLY ONE OF SAID ELECTRO-OPTICAL PAIRS IN THE HIGH CONDUCTIVITY STATE, MEANS FOR SHUNTING THE PHOTOCONDUCTIVE DEVICE IN ONE OF SAID ELECTRO-OPTICAL PAIRS WHILE SAID ONE ELECTRO-OPTICAL PAIR IS IN THE LOW CONDUCTIVITY STATE, SAID MEANS COMPRISING A PHOTOCONDUCTIVE DEVICE RESPONSIVE TO RADIATION FROM THE ELECTROLUMINESCENT DEVICE OF ONE OF SAID ELECTRO-OPTICAL PAIRS IN THE HIGH CONDUCTIVITY STATE.
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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) | 1968-01-26 | 1968-07-27 | 1969-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-26 | 1972-07-27 | 1973-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-26 | 1976-07-27 | 1977-01-26 | $7700.00 | Window Closed / Lapsed |