Patent US3129386A successfully refreshed from Google Patents.
US3129386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic antenna impedance matching and loading unit
Assignee: SUNAIR ELECTRONICS Inc
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Filing: 1962-05-21
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Granted: 1964-04-14
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Expires: 1982-05-21
Abstract
No abstract record available.
Inventors
- 👤 Carl C Daly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:19
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/38; H03H7/40
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
AS AN ARTICLE OF MANUFACTURE, A MATCHING UNIT FOR MATCHING A FIXED ANTENNA TO A MULTIPLE CHANNEL TRANSMITTER COVERING A WIDE FREQUENCY RANGE, COMPRISING IN SAID UNIT INPUT AND OUTPUT TERMINALS; A PLURALITY OF ADJUSTABLE IMPEDANCE ELEMENTS; SWITCH MEANS HAVING POSITIONS CORRESPONDING WITH EACH OF SAID CHANNELS FOR SELECTIVELY INTERCONNECTING SOME OF SAID ELEMENTS TO FORM A PI-NETWORK BETWEEN SAID TERMINALS PRE-ADJUSTED TO MATCH SAID ANTENNA TO THE TRANSMITTER AT THE FREQUENCY OF THE CHANNEL SELECTED; AND ELECTRICALLY OPERATED STEP-BY-STEP ACTUATOR MEANS OPERATIVELY CONNECTED TO SAID SWITCH MEANS TO STEP SAID SWITCH MEANS FROM CHANNEL TO CHANNEL WHEN ENERGIZED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |