Patent US1967586A successfully refreshed from Google Patents.
Patent US3199052A successfully refreshed from Google Patents.
US3199052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal oscillator
Assignee: US Philips Corp
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Filing: 1961-09-11
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Granted: 1965-08-03
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Expires: 1981-09-11
Abstract
No abstract record available.
Inventors
- 👤 Marcel Antoine Arnold Gh Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:30
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/30; H03B5/32; H03B5/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A TRANSISTOR CRYSTAL OSCILLATOR COMPRISING FIRST AND SECOND TRANSISTORS, EACH HAVING AT LEAST AN EMITTER, A COLLECTOR AND A BASE ELECTRODE, A DIRECT CURRENT CONNECTION BETWEEN THE COLLECTOR OF SAID FIRST TRANSISTOR AND THE BASE OF SAID SECOND TRANSISTOR, POSITIVE FEEDBACK CIRCUIT MEANS CONNECTED BETWEEN THE COLLECTOR OF SAID SECOND TRANSISTOR AND THE BASE OF SAID FIRST TRANSISTOR, AN EMITTER DIRECT CURRENT PATH FOR SAID SECOND TRANSISTOR, SAID DIRECT CURRENT PATH COMPRISING NEGATIVE FEEDBACK RESISTANCE MEANS, MEANS CONNECTING SAID NEGATIVE FEEDBACK RESISTANCE MEANS BETWEEN THE EMITTER OF SAID SECOND TRANSISTOR AND THE BASE OF SAID FIRST TRANSISTOR, A SOURCE OF OPERATING CURRENT, MEANS CONNECTING SAID SOURCE BETWEEN THE EMITTERS AND COLLECTORS OF SAID TRANSISTORS, CRYSTAL MEANS, AND MEANS CONNECTING SAID CRYSTAL MEANS IN PARALLEL WITH AT LEAST A PORTION OF SAID DIRECT CURRENT PATH.
Claim 2
Dependent Claim
134 words
A TRANSISTOR CRYSTAL OSCILLATOR COMPRISING FIRST AND SECOND TRANSISTORS, EACH HAVING AT LEAST AN EMITTER, A COLLECTOR AND A BASE ELECTRODE, A DIRECT CURRENT CONNECTION BETWEEN THE COLLECTOR OF SAID FIRST TRANSISTOR AND THE BASE OF SAID SECOND TRANSISTOR, POSITIVE FEEDBACK CIRCUIT MEANS CONNECTED BETWEEN THE COLLECTOR OF SAID SECOND TRANSISTOR AND THE BASE OF SAID FIRST TRANSISTOR, AN EMITTER DIRECT CURRENT PATH FOR SAID SECOND TRANSISTOR, SAID DIRECT CURRENT PATH COMPRISING NEGATIVE FEEDBACK RESISTANCE MEANS, MEANS CONNECTING SAID NEGATIVE FEEDBACK RESISTANCE MEANS BETWEEN THE EMITTER OF SAID SECOND TRANSISTOR AND THE BASE OF SAID FIRST TRANSISTOR, A SOURCE OF OPERATING CURRENT, MEANS CONNECTING SAID SOURCE BETWEEN THE EMITTERS AND COLLECTORS OF SAID TRANSISTORS, CRYSTAL MEANS, AND MEANS CONNECTING SAID CRYSTAL MEANS IN PARALLEL WITH AT LEAST A PORTION OF SAID DIRECT CURRENT PATH.
References Cited (Backward Citations)
US2070647A
Cited
US2912654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |