Patent US4171054A successfully refreshed from Google Patents.
Patent US3178648A successfully refreshed from Google Patents.
US3178648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistorized amplifier utilizing an input transformer bootstrap configuration
Assignee: Individual
•
Filing: 1962-06-18
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Granted: 1965-04-13
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Expires: 1982-06-18
Abstract
No abstract record available.
Inventors
- 👤 De Loss J Tanner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:32
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/181; H03F3/183
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
176 words
AN AMPLIFYING CIRCUIT FOR ENERGIZATION FROM A SOURCE OF POTENTIAL HAVING FIRST AND SECOND POLES COMPRISING FIRST AND SECOND SEMICONDUCTOR UNITS, EACH UNIT HAVING INPUT, OUTPUT, AND COMMON ELECTRODES, A FIRST TRANSFORMER HAVING PRIMARY AND SECONDARY WINDING, AN INPUT CIRCUIT INCLUDING SAID PRIMARY WINDING, MEANS FOR COUPLING ONE END OF SAID SECONDARY WINDING TO THE INPUT ELECTRODE OF THE FIRST UNIT, MEANS INCLUDING A FIRST RESISTANCE FOR COUPLING THE OTHER END OF SAID SECONDARY WINDING TO GROUND, A FIRST CAPACITOR HAVING ONE PLATE COUPLED TO SAID OTHER END OF THE SECONDARY WINDING, MEANS INCLUDING A VARIABLE RESISTOR FOR INTERCOUPLING THE OTHER PLATE OF SAID CAPACITOR TO THE OUTPUT ELECTRODE OF SAID FIRST UNIT, MEANS FOR COUPLING THE COMMON ELECTRODE OF SAID FIRST UNIT TO GROUND, MEANS FOR COUPLING THE INPUT ELECTRODE OF SAID SECOND UNIT TO THE COMMON CONNECTION BETWEEN SAID CAPACITOR AND SAID VARIABLE RESISTOR, A SECOND RESISTANCE INTERCOUPLED BETWEEN SAID OTHER END OF THE SECONDARY WINDING AND SAID FIRST POLE, A THIRD RESISTANCE COUPLED BETWEEN SAID COMMON CONNECTION AND SAID FIRST POLE, A FOURTH
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |