US2804521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit interrupter
Assignee: McGraw Edison Co
•
Filing: 1953-09-08
•
Granted: 1957-08-27
•
Expires: 1973-09-08
Abstract
No abstract record available.
Inventors
- 👤 Anthony Van Ryan
- 👤 Date Kazuo Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:20
CPC Classifications
H; H01; H01H; H01H75/00; H01H75/02; H01H75/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US758020A
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US1429528A
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US1522187A
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US1837805A
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US1741824A
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US2145140A
Cited
US2246298A
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US2476076A
Cited
US2483602A
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US2567411A
Cited
US2593225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |