US2506546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker
Assignee: ELECTRICAL ENG EQUIPMENT CO
•
Filing: 1943-11-20
•
Granted: 1950-05-02
•
Expires: 1963-11-20
Abstract
No abstract record available.
Inventors
- 👤 Farrell Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:36
CPC Classifications
H; H01; H01H; H01H75/00; H01H75/02; H01H75/04; H01H71/00; H01H71/02; H01H71/0264; Y; Y10; Y10T; Y10T74/00; Y10T74/11; Y10T74/114; Y10T74/116
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1744200A
Cited
US2024216A
Cited
US2205083A
Cited
US2247861A
Cited
US2288324A
Cited
US2311714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |