Patent US3141135A successfully refreshed from Google Patents.
US3141135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductive oscillator-mixer device
Assignee: Westinghouse Electric Corp
•
Filing: 1962-05-11
•
Granted: 1964-07-14
•
Expires: 1982-05-11
Abstract
No abstract record available.
Inventors
- 👤 Philipp R Amlinger
- 👤 Joph P Stelmak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:20
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/60; H10D84/611; H10D84/613; H10D84/615; H03; H03D; H03D7/00; H03D7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
ELECTRONIC APPARATUS FOR PRODUCING A LOCAL OSCILLATOR SIGNAL AND MIXING THE LOCAL OSCILLATOR SIGNAL WITH AN INPUT CARRIER WAVE; SAID APPARATUS COMPRISING FIRST AND SECOND TRANSISTOR MEANS, EACH INCLUDING BASE, EMITTER AND COLLECTOR REGIONS; MEANS TO PROVIDE A DIRECT RESISTIVE CONNECTION BETWEEN THE EMITTER OF SAID FIRST TRANSISTOR MEANS AND THE BASE OF SAID SECOND TRANSISTOR; MEANS TO PROVIDE A RESISTIVE FEEDBACK LOOP BETWEEN THE COLLECTOR AND BASE OF SAID FIRST TRANSISTOR MEANS TO PERMIT OPERATION OF SAID FIRST TRANSISTOR
Claim 2
Dependent Claim
80 words
ELECTRONIC APPARATUS FOR PRODUCING A LOCAL OSCILLATOR SIGNAL AND MIXING THE LOCAL OSCILLATOR SIGNAL WITH AN INPUT CARRIER WAVE; SAID APPARATUS COMPRISING FIRST AND SECOND TRANSISTOR MEANS, EACH INCLUDING BASE, EMITTER AND COLLECTOR REGIONS; MEANS TO PROVIDE A DIRECT RESISTIVE CONNECTION BETWEEN THE EMITTER OF SAID FIRST TRANSISTOR MEANS AND THE BASE OF SAID SECOND TRANSISTOR; MEANS TO PROVIDE A RESISTIVE FEEDBACK LOOP BETWEEN THE COLLECTOR AND BASE OF SAID FIRST TRANSISTOR MEANS TO PERMIT OPERATION OF SAID FIRST TRANSISTOR
References Cited (Backward Citations)
US2851594A
Cited
US2853602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |