US3140444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tuner
Assignee: RCA Corp
•
Filing: 1962-03-26
•
Granted: 1964-07-07
•
Expires: 1982-03-26
Abstract
No abstract record available.
Inventors
- 👤 Carlson David John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:30
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/06; H03D9/0608
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
IN A HIGH FREQUENCY TUNER AN ULTRA HIGH FREQUENCY TRANSMISSION LINE COMPRISING, IN COMBINATION: A CONDUCTIVE GROUND PLANE, A TRANSMISSION LINE CONDUCTOR SPACED FROM SAID GROUND PLANE, AND FIRST AND SECOND MEANS FOR ADJUSTING THE SPACING BETWEEN SAID TRANSMISSION LINE CONDUCTOR AND SAID GROUND PLANE, TO ALTER THE CHARACTERISTIC IMPEDANCE OF SAID TRANSMISSION LINE WHEREBY SAID FREQUENCY CHARACTERISTICS OF SAID TRANSMISSION LINE ARE CHANGED.
References Cited (Backward Citations)
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Cited
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Cited
US2644095A
Cited
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
US3013187A
Cited
US2966618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |