US3350667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic tuning fork resonator
Assignee: PHILAMON LAB Inc
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Filing: 1962-11-13
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Granted: 1967-10-31
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Expires: 1982-11-13
Abstract
No abstract record available.
Inventors
- 👤 Robert R Shreve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:12
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/54; H03H9/545; H03B; H03B5/00; H03B5/30; H03H9/15; H03H9/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
AN ELECTROMECHANICAL FREQUENCY SELECTIVE DEVICE COMPRISING A PLURALITY OF TUNING FORKS OF DIFFERENT FREQUENCIES, AT LEAST ONE TINE OF EACH SAID TUNING FORK HAVING A RESPECTIVE CONDUCTIVE SURFACE AREA, ONE COMMON ELECTRODE CLOSELY SPACED WITH RESPECT TO ALL SAID SURFACE AREAS, MEANS FOR APPLYING AN INPUT SIGNAL VOLTAGE BETWEEN SAID ELECTRODE AND SAID SURFACE AREAS TO CAUSE SAID TINES TO BE ATTRACTED TOWARD SAID ELECTRODE IN ACCORDANCE
Claim 2
Dependent Claim
67 words
AN ELECTROMECHANICAL FREQUENCY SELECTIVE DEVICE COMPRISING A PLURALITY OF TUNING FORKS OF DIFFERENT FREQUENCIES, AT LEAST ONE TINE OF EACH SAID TUNING FORK HAVING A RESPECTIVE CONDUCTIVE SURFACE AREA, ONE COMMON ELECTRODE CLOSELY SPACED WITH RESPECT TO ALL SAID SURFACE AREAS, MEANS FOR APPLYING AN INPUT SIGNAL VOLTAGE BETWEEN SAID ELECTRODE AND SAID SURFACE AREAS TO CAUSE SAID TINES TO BE ATTRACTED TOWARD SAID ELECTRODE IN ACCORDANCE
References Cited (Backward Citations)
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |