US3394268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Logic switching circuit
Assignee: AT&T Inc
•
Filing: 1965-02-01
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Granted: 1968-07-23
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Expires: 1985-02-01
Abstract
No abstract record available.
Inventors
- 👤 Bernard T Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:15
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/08; H03K19/082; H03K19/084; H03K19/01; H03K19/013; H03K19/0136; H10; H10D; H10D84/00; H10D84/60; H10D84/611; H10D84/613
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
74 words
A SEMICONDUCTOR LOGIC SWITCHING CIRCUIT COMPRISING AN INPUT STAGE, AND OUTPUT STAGE, AND AN INTERMEDIATE STAGE CONNECTING SAID INPUT AND OUTPUT STAGES, SAID INPUT STAGE INCLUDING A VOLTAGE SOURCE AND GATE MEANS RESPONSIVE TO INPUT SIGNALS FOR CONTROLLING THE APPLICATION OF VOLTAGE FROM SAID VOLTAGE SOURCE TO SAID INTERMEDIATE STAGE, SAID OUTPUT STAGE INCLUDING A TRANSISTOR IN INVERTER CONFIGURATION AND AN OUTPUT TERMINAL, SAID INTERMEDIATE STAGE COMPRISING FIRST CIRCUIT MEANS FOR SHIFTING THE VOLT-
References Cited (Backward Citations)
US3217181A
Cited
US3287577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |