US2834848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric switch
Assignee: AT&T Inc
•
Filing: 1955-09-02
•
Granted: 1958-05-13
•
Expires: 1975-09-02
Abstract
No abstract record available.
Inventors
- 👤 Walter B Ellwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:24
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/28; H01H51/287
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1230728A
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DE491421C
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US2029266A
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US2037535A
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US2076162A
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US2283340A
Cited
GB559453A
Cited
US2367123A
Cited
US2527475A
Cited
US2658971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |