Patent US2825770A successfully refreshed from Google Patents.
US2825770A
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Time delay control device
Assignee: Specialties Development Corp
•
Filing: 1954-08-20
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Granted: 1958-03-04
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Expires: 1974-08-20
Abstract
No abstract record available.
Inventors
- 👤 Robert G Helsper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:06
CPC Classifications
H; H01; H01H; H01H7/00; H01H7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2602865A
Cited
US2149542A
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US2056193A
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US2162442A
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US2112422A
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US2202297A
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US2657743A
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US2674664A
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US2690526A
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US2614187A
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US2677029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |