US3215858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed transistor switching circuit
Assignee: AT&T Inc
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Filing: 1962-11-15
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Granted: 1965-11-02
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Expires: 1982-11-15
Abstract
No abstract record available.
Inventors
- 👤 Philip A Harding
- 👤 Molen Gordon L Vander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:23
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN COMBINATION, FIRST AND SECOND TRANSISTORS, MEANS RESPONSIVE TO THE ENERGIZATION OF SAID FIRST TRANSISTOR FOR SUPPLYING A TRANSIENT OVERDRIVE SIGNAL OF ONE POLARITY TO SAID SECOND TRANSISTOR TO SPEED UP ITS ENERGIZATION AND RESPONSIVE TO THE DE-ENERGIZATION OF SAID FIRST TRANSISTOR FOR SUPPLYING A SECOND TRANSIENT SIGNAL OF THE OPPOSITE POLARITY TO SAID SECOND TRANSISTOR TO SPEED UP ITS DE-ENERGIZATION, AND SAID MEANS INCLUDING A CONNECTION FOR APPLYING A PORTION OF SAID TRANSIENT OVERRIDE SIGNAL TO SAID FIRST TRANSISTOR TO SPEED UP ITS ENERGIZATION AND FOR APPLYING A PORTION OF SAID SECOND TRANSIENT SIGNAL TO SAID FIRST TRANSISTOR TO SPEED UP ITS DE-ENERGIZATION.
Claim 2
Dependent Claim
104 words
IN COMBINATION, FIRST AND SECOND TRANSISTORS, MEANS RESPONSIVE TO THE ENERGIZATION OF SAID FIRST TRANSISTOR FOR SUPPLYING A TRANSIENT OVERDRIVE SIGNAL OF ONE POLARITY TO SAID SECOND TRANSISTOR TO SPEED UP ITS ENERGIZATION AND RESPONSIVE TO THE DE-ENERGIZATION OF SAID FIRST TRANSISTOR FOR SUPPLYING A SECOND TRANSIENT SIGNAL OF THE OPPOSITE POLARITY TO SAID SECOND TRANSISTOR TO SPEED UP ITS DE-ENERGIZATION, AND SAID MEANS INCLUDING A CONNECTION FOR APPLYING A PORTION OF SAID TRANSIENT OVERRIDE SIGNAL TO SAID FIRST TRANSISTOR TO SPEED UP ITS ENERGIZATION AND FOR APPLYING A PORTION OF SAID SECOND TRANSIENT SIGNAL TO SAID FIRST TRANSISTOR TO SPEED UP ITS DE-ENERGIZATION.
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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |