Patent US3398403A successfully refreshed from Google Patents.
US3398403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data processing circuit
Assignee: AT&T Inc
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Filing: 1962-01-15
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Granted: 1968-08-20
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Expires: 1982-01-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Bernard Ostendorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:22
CPC Classifications
G; G06; G06F; G06F5/00; G06F5/06; G06F5/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN A COMMUNICATION SWITCHING SYSTEM THE COMBINATION COMPRISING A PLURAL STAGE SHIFT REGISTER HAVING INPUT, OUTPUT, AND ADVANCE TERMINALS, EACH OF SAID STAGES HAVING SET, RESET AND OUTPUT TERMINALS, A SERIAL MESSAGE DATA SOURCE CONNECTED TO SAID SHIFT REGISTER INPUT TERMINAL, A RECYCLE PULSE SOURCE CONNECTED TO CERTAIN OF SAID SET AND MEANS CONNECTED TO CERTAIN OF SAID SHIFT REGISTER STAGE ESTABLISHING A DISCRETE INITIAL PATTERN OF ELECTRICAL STATES OF SAID STAGES OF SAID SHIFT REGISTER, AN ADVANCE PULSE SOURCE CONTROLLED BY SAID DATA SOURCE AND CONNECTED TO SAID SHIFT REGISTER ADVANCE TERMINALS, AND BISTABLE CIRCUIT MEANS CONNECTED TO CERTAIN OF SAID SHIFT REGISTER STAGE OUTPUT TERMINALS AND RESPONSIVE TO THE INITIAL CHANGE OF STATE OF SAID CERTAIN STAGES SUBSEQUENT TO THE OCCURRENCE OF A PULSE FROM SAID RECYCLE PULSE SOURCE FOR INDICATING THE POSITION OF SAID SERIAL MESSAGE DATA IN SAID SHIFT REGISTER.
Claim 2
Dependent Claim
144 words
IN A COMMUNICATION SWITCHING SYSTEM THE COMBINATION COMPRISING A PLURAL STAGE SHIFT REGISTER HAVING INPUT, OUTPUT, AND ADVANCE TERMINALS, EACH OF SAID STAGES HAVING SET, RESET AND OUTPUT TERMINALS, A SERIAL MESSAGE DATA SOURCE CONNECTED TO SAID SHIFT REGISTER INPUT TERMINAL, A RECYCLE PULSE SOURCE CONNECTED TO CERTAIN OF SAID SET AND MEANS CONNECTED TO CERTAIN OF SAID SHIFT REGISTER STAGE ESTABLISHING A DISCRETE INITIAL PATTERN OF ELECTRICAL STATES OF SAID STAGES OF SAID SHIFT REGISTER, AN ADVANCE PULSE SOURCE CONTROLLED BY SAID DATA SOURCE AND CONNECTED TO SAID SHIFT REGISTER ADVANCE TERMINALS, AND BISTABLE CIRCUIT MEANS CONNECTED TO CERTAIN OF SAID SHIFT REGISTER STAGE OUTPUT TERMINALS AND RESPONSIVE TO THE INITIAL CHANGE OF STATE OF SAID CERTAIN STAGES SUBSEQUENT TO THE OCCURRENCE OF A PULSE FROM SAID RECYCLE PULSE SOURCE FOR INDICATING THE POSITION OF SAID SERIAL MESSAGE DATA IN SAID SHIFT REGISTER.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |