Patent US3086172A successfully refreshed from Google Patents.
US3086172A
Expired / Lapsed
US
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Tunable filter arrangement
Assignee: General Electric Co
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Filing: 1959-12-18
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Granted: 1963-04-16
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Expires: 1979-12-18
Abstract
No abstract record available.
Inventors
- 👤 Major A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:30
CPC Classifications
H; H03; H03H; H03H17/00; H03H17/02; H03H15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN COMBINATION, A PLURALITY OF FIRST SIGNALS OF COMMON FREQUENCY AND GIVEN PHASE ANGLES, A SOURCE OF A PLURALITY OF SECOND SIGNALS HAVING A FIXED FREQUENCY DIFFERENCE BETWEEN EACH OF SAID SECOND SIGNALS, MEANS FOR MIXING EACH OF SAID FIRST SIGNALS WITH A RESPECTIVE SECOND SIGNAL TO PROVIDE THIRD SIGNALS, A SOURCE OF A PLURALITY OF FOURTH SIGNALS HAVING SAID FIXED FREQUENCY DIFFERENCE BETWEEN EACH OF SAID FOURTH SIGNALS AND AN ADJUSTABLE PHASE ANGLE, MEANS FOR MIXING SAID EACH OF SAID THIRD SIGNALS WITH A RESPECTIVE ONE OF SAID FOURTH SIGNALS TO DERIVE FIFTH SIGNALS, AND MEANS FOR ADJUSTING THE PHASE ANGLE OF SAID FOURTH SIGNALS.
Claim 2
Dependent Claim
106 words
IN COMBINATION, A PLURALITY OF FIRST SIGNALS OF COMMON FREQUENCY AND GIVEN PHASE ANGLES, A SOURCE OF A PLURALITY OF SECOND SIGNALS HAVING A FIXED FREQUENCY DIFFERENCE BETWEEN EACH OF SAID SECOND SIGNALS, MEANS FOR MIXING EACH OF SAID FIRST SIGNALS WITH A RESPECTIVE SECOND SIGNAL TO PROVIDE THIRD SIGNALS, A SOURCE OF A PLURALITY OF FOURTH SIGNALS HAVING SAID FIXED FREQUENCY DIFFERENCE BETWEEN EACH OF SAID FOURTH SIGNALS AND AN ADJUSTABLE PHASE ANGLE, MEANS FOR MIXING SAID EACH OF SAID THIRD SIGNALS WITH A RESPECTIVE ONE OF SAID FOURTH SIGNALS TO DERIVE FIFTH SIGNALS, AND MEANS FOR ADJUSTING THE PHASE ANGLE OF SAID FOURTH SIGNALS.
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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) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |