US2506744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retarded circuit breaker after reclosing
Assignee: McGraw Electric Co
•
Filing: 1945-01-10
•
Granted: 1950-05-09
•
Expires: 1965-01-10
Abstract
No abstract record available.
Inventors
- 👤 Schindler Carl
- 👤 Froland Olav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:00
CPC Classifications
H; H01; H01H; H01H75/00; H01H75/02; H01H75/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US508652A
Cited
US947981A
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US1380595A
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US2069082A
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US2334571A
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US2352556A
Cited
US2288953A
Cited
US2339025A
Cited
US2405606A
Cited
US2414786A
Cited
US2400936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |