US2849622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control circuits
Assignee: Individual
•
Filing: 1946-07-19
•
Granted: 1958-08-26
•
Expires: 1966-07-19
Abstract
No abstract record available.
Inventors
- 👤 Darrin H Gridley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:24
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/54; G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/013
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1580088A
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US1867139A
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US1669153A
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US2088466A
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US2043671A
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US2056912A
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US2193789A
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US2162508A
Cited
US2185192A
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US2282182A
Cited
US2404696A
Cited
US2441006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |