Patent US3493292A successfully refreshed from Google Patents.
US3493292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tuning fork structures
Assignee: FREQUENCY CONTROL PRODUCTS Inc A CORP OF NY
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Filing: 1966-07-22
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Granted: 1970-02-03
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Expires: 1986-07-22
Abstract
No abstract record available.
Inventors
- 👤 Frank Dostal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:31
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/10; G01J1/20; G01J1/34; G01J1/36; G02; G02B; G02B26/00; G02B26/02; G02B26/04; H; H03; H03B; H03B5/00; H03B5/30; H03H; H03H9/00; H03H9/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US465832A
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US1631021A
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US1958071A
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US2581963A
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US2349125A
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US3093743A
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US3178579A
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US3350667A
Cited
US3192701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |