US2467542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc extinguishing device
Assignee: Allis Chalmers Corp
•
Filing: 1945-06-02
•
Granted: 1949-04-19
•
Expires: 1965-06-02
Abstract
No abstract record available.
Inventors
- 👤 Philip L Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:08
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/72; H01H33/75
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1899612A
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US1981404A
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US1981709A
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US1849875A
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US2075749A
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US2109685A
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US2156663A
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US2385008A
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US2372589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-18 | 1952-10-18 | 1953-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-18 | 1956-10-18 | 1957-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-18 | 1960-10-18 | 1961-04-19 | $7700.00 | Window Closed / Lapsed |