Patent US3645241A successfully refreshed from Google Patents.
Patent US2290867A successfully refreshed from Google Patents.
US2290867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control for power plants
Assignee: Individual
•
Filing: 1938-11-04
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Granted: 1942-07-28
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Expires: 1958-11-04
Abstract
No abstract record available.
Inventors
- 👤 Herman H Curry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:30
CPC Classifications
G; G05; G05D; G05D13/00; B; B63; B63H; B63H21/00; B63H21/12; B63H21/17; B63H23/00; B63H23/22; B63H23/24; B63H21/21; B63H2021/216
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-07-27 | 1946-01-26 | 1946-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-07-27 | 1950-01-26 | 1950-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-07-27 | 1954-01-26 | 1954-07-28 | $7700.00 | Window Closed / Lapsed |