US3204037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic telecommunication exchanges
Assignee: International Standard Electric Corp
•
Filing: 1960-08-30
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Granted: 1965-08-31
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Expires: 1980-08-30
Abstract
No abstract record available.
Inventors
- 👤 Hartley George Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:04
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/521
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
AN ELECTRONIC SWITCHING NETWORK HAVING A PLURALITY OF INPUTS AND OUTPUTS INTERCONNECTED BY A PLURALITY OF SERIES-CONNECTED BISTABLE PNPN DEVICES EACH HAVING A HIGH IMPEDANCE STATE AND A LOW IMPEDANCE STATE, MEANS FOR APPLYING AN INPUT MARKING POTENTIAL AND A HOLDING POTENTIAL TO ANY DESIRED INPUT, MEANS INCLUDING A CLAMPING CIRCUIT FOR MASKING SAID HOLDING POTENTIAL AND MAINTAINING SAID DESIRED INPUT AT SAID INPUT MARKING POTENTIAL, MEANS FOR APPLYING AN OUTPUT MARKING POTENTIAL TO ANY DESIRED OUTPUT, TEST MEANS FOR SELECTING A PATH BETWEEN SAID MARKED INPUT AND SAID MARKED OUTPUT, WHICH PATH INCLUDES A PLURALITY OF SERIES-CONNECTED DEVICES IN THEIR HIGH IMPEDANCE STATE, MEANS FOR SEQUENTIALLY APPLYING AN OPERATING POTENTIAL TO EACH OF THE SAID DEVICES IN SAID SELECTED PATH TO SWITCH THE LAST-SAID DEVICES TO THEIR LOW IMPEDANCE STATE AND FOR REMOVING SAID OPERATING POTENTIAL FROM EACH DEVICE RESPONSIVE TO THE SAID SWITCHING OPERATION, AND MEANS RESPONSIVE TO THE SAID REMOVAL OF SAID OPERATING POTENTIALS FOR DISABLING AND CLAMPING CIRCUIT TO AUTOMATICALLY RENDER SAID HOLDING POTENTIAL EFFECTIVE.
Claim 2
Dependent Claim
169 words
AN ELECTRONIC SWITCHING NETWORK HAVING A PLURALITY OF INPUTS AND OUTPUTS INTERCONNECTED BY A PLURALITY OF SERIES-CONNECTED BISTABLE PNPN DEVICES EACH HAVING A HIGH IMPEDANCE STATE AND A LOW IMPEDANCE STATE, MEANS FOR APPLYING AN INPUT MARKING POTENTIAL AND A HOLDING POTENTIAL TO ANY DESIRED INPUT, MEANS INCLUDING A CLAMPING CIRCUIT FOR MASKING SAID HOLDING POTENTIAL AND MAINTAINING SAID DESIRED INPUT AT SAID INPUT MARKING POTENTIAL, MEANS FOR APPLYING AN OUTPUT MARKING POTENTIAL TO ANY DESIRED OUTPUT, TEST MEANS FOR SELECTING A PATH BETWEEN SAID MARKED INPUT AND SAID MARKED OUTPUT, WHICH PATH INCLUDES A PLURALITY OF SERIES-CONNECTED DEVICES IN THEIR HIGH IMPEDANCE STATE, MEANS FOR SEQUENTIALLY APPLYING AN OPERATING POTENTIAL TO EACH OF THE SAID DEVICES IN SAID SELECTED PATH TO SWITCH THE LAST-SAID DEVICES TO THEIR LOW IMPEDANCE STATE AND FOR REMOVING SAID OPERATING POTENTIAL FROM EACH DEVICE RESPONSIVE TO THE SAID SWITCHING OPERATION, AND MEANS RESPONSIVE TO THE SAID REMOVAL OF SAID OPERATING POTENTIALS FOR DISABLING AND CLAMPING CIRCUIT TO AUTOMATICALLY RENDER SAID HOLDING POTENTIAL EFFECTIVE.
References Cited (Backward Citations)
US3020353A
Cited
US2946855A
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US3027427A
Cited
US2951124A
Cited
US2951125A
Cited
US3033936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |