Patent US3254231A successfully refreshed from Google Patents.
US3254231A
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Frequency changer employing a moving sonic-energy-reflecting boundary in a semiconductor medium
Assignee: Lanteris Space LLC
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Filing: 1962-07-10
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Granted: 1966-05-31
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Expires: 1982-07-10
Abstract
No abstract record available.
Inventors
- 👤 Om P Gandhi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:24
CPC Classifications
H; H03; H03D; H03D7/00; G; G10; G10K; G10K11/00; H02; H02M; H02M5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
IN COMBINATION; A SOURCE OF ELECTRICAL SIGNAL ENERGY, A SONIC TRANSDUCER CONNECTED TO SAID SOURCE, A MEDIUM CAPABLE OF TRANSMITTER SONIC ENERGY COUPLED TO SAID TRANSDUCER, MEANS TO PRODUCE A MOVING SONICALLY REFLECTIVE BOUNDARY IN SAID MEDIUM, SO THAT SONIC ENERGY MAY BE REFLECTED FROM SAID MOVING BOUNDARY, AND MEANS TO RE-
Claim 2
Dependent Claim
52 words
IN COMBINATION; A SOURCE OF ELECTRICAL SIGNAL ENERGY, A SONIC TRANSDUCER CONNECTED TO SAID SOURCE, A MEDIUM CAPABLE OF TRANSMITTER SONIC ENERGY COUPLED TO SAID TRANSDUCER, MEANS TO PRODUCE A MOVING SONICALLY REFLECTIVE BOUNDARY IN SAID MEDIUM, SO THAT SONIC ENERGY MAY BE REFLECTED FROM SAID MOVING BOUNDARY, AND MEANS TO RE-
References Cited (Backward Citations)
US3185935A
Cited
US3185942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |