Patent US3408539A successfully refreshed from Google Patents.
US3408539A
Expired / Lapsed
US
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Electric timing circuits
Assignee: A Reyrolle and Co Ltd
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Filing: 1966-04-22
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Granted: 1968-10-29
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Expires: 1986-04-22
Abstract
No abstract record available.
Inventors
- 👤 Legg Malcolm
- 👤 Patrickson John Brian
- 👤 Wedepohl Leonhard Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:59
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/13; G; G04; G04C; G04C23/00; G04C23/02; G04C23/12; H02; H02H; H02H3/00; H02H3/08; H02H3/093; H03K17/00; H03K17/28
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) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |