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Patent US3386004A successfully refreshed from Google Patents.
US3386004A
Expired / Lapsed
US
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Low voltage safety circuit for electric power units
Assignee: SENTRY Inc
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Filing: 1965-08-09
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Granted: 1968-05-28
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Expires: 1985-08-09
Abstract
No abstract record available.
Inventors
- 👤 Edward W Dwyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:49
CPC Classifications
B; B28; B28D; B28D1/00; B28D1/14; H; H02; H02H; H02H5/00; H02H5/12
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) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |