Patent US3477280A successfully refreshed from Google Patents.
US3477280A
Expired / Lapsed
US
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Multipoint vibration detector
Assignee: HAROLD D BLACKMER
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Filing: 1966-02-03
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Granted: 1969-11-11
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Expires: 1986-02-03
Abstract
No abstract record available.
Inventors
- 👤 Harold D Blackmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:46
CPC Classifications
G; G01; G01M; G01M15/00; G01M15/04; G01M15/12; H; H03; H03F; H03F1/00; H03F1/34; H03F1/347
Claims Analysis
Total Claims: 0
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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) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |