US2523752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric regulation operated switch
Assignee: Individual
•
Filing: 1944-11-29
•
Granted: 1950-09-26
•
Expires: 1964-11-29
Abstract
No abstract record available.
Inventors
- 👤 Anna W Creveling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:55
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/16; H02J7/22; H02J7/225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US989792A
Cited
GB191406425A
Cited
US1427369A
Cited
US1576768A
Cited
US1497500A
Cited
US2161929A
Cited
US2209051A
Cited
US2354038A
Cited
US2307025A
Cited
US2339526A
Cited
US2358482A
Cited
US2339037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |