Patent US3305709A successfully refreshed from Google Patents.
US3305709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
T-shape field-effect switch having a continuous high output impedance
Assignee: Individual
•
Filing: 1964-07-24
•
Granted: 1967-02-21
•
Expires: 1984-07-24
Abstract
No abstract record available.
Inventors
- 👤 Philip R Thomas
- 👤 Melvin W Larkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:05
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/80; H10D84/82; H10D84/83; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/687; H03K17/6877
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A SEMICONDUCTOR SWITCH COMPRISING INPUT, OUTPUT AND COMMON TERMINALS AND FIRST AND SECOND CONTROL TERMINALS, FIRST, SECOND AND THIRD FIELD-EFFECT TRANSISTORS EACH HAVING A SOURCE, A DRAIN AND A GATE, THE SOURCE OF THE FIRST TRANSISTOR DIRECTLY CONNECTED TO THE INPUT TERMINAL, THE DRAIN OF THE SECOND TRANSISTOR DIRECTLY CONNECTED TO THE OUTPUT TERMINAL, THE DRAIN OF THE THIRD TRANSISTOR DIRECTLY CONNECTED TO THE COMMON TERMINAL, THE DRAIN OF THE FIRST TRANSISTOR DIRECTLY CONNECTED TO THE SOURCES OF THE SECOND AND THIRD TRANSISTORS, THE GATES OF THE FIRST AND SECOND TRANSISTORS DIRECTLY CONNECTED TOGETHER AND
Claim 2
Dependent Claim
95 words
A SEMICONDUCTOR SWITCH COMPRISING INPUT, OUTPUT AND COMMON TERMINALS AND FIRST AND SECOND CONTROL TERMINALS, FIRST, SECOND AND THIRD FIELD-EFFECT TRANSISTORS EACH HAVING A SOURCE, A DRAIN AND A GATE, THE SOURCE OF THE FIRST TRANSISTOR DIRECTLY CONNECTED TO THE INPUT TERMINAL, THE DRAIN OF THE SECOND TRANSISTOR DIRECTLY CONNECTED TO THE OUTPUT TERMINAL, THE DRAIN OF THE THIRD TRANSISTOR DIRECTLY CONNECTED TO THE COMMON TERMINAL, THE DRAIN OF THE FIRST TRANSISTOR DIRECTLY CONNECTED TO THE SOURCES OF THE SECOND AND THIRD TRANSISTORS, THE GATES OF THE FIRST AND SECOND TRANSISTORS DIRECTLY CONNECTED TOGETHER AND
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |