Patent US3493912A successfully refreshed from Google Patents.
US3493912A
Expired / Lapsed
US
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Strain responsive transducer means of the diaphragm type
Assignee: ETHER ENG Ltd
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Filing: 1967-10-25
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Granted: 1970-02-03
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Expires: 1987-10-25
Abstract
No abstract record available.
Inventors
- 👤 Victor Frederick George Tull
- 👤 Frederick Edward Duffield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:57
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0041; G01L9/0051; G01L9/0052; G01L9/0055; G01P; G01P1/00; G01P1/003; G01P15/00; G01P15/02; G01P15/08; G01P15/12; G01P15/123; G01P15/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3049685A
Cited
GB1000456A
Cited
US3270554A
Cited
US3213681A
Cited
US3303451A
Cited
US3325761A
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 |