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US2900461A
Expired / Lapsed
US
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Electrical switching units
Assignee: Individual
•
Filing: 1955-06-01
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Granted: 1959-08-18
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Expires: 1975-06-01
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Allison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:51
CPC Classifications
H; H01; H01H; H01H19/00; H01H19/54; H01H19/56; H01H19/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2177481A
Cited
GB501556A
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US2292717A
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US2631211A
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US2497747A
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US2557234A
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US2584176A
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US2682643A
Cited
GB676343A
Cited
US2650960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |