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Patent US2825768A successfully refreshed from Google Patents.
US2825768A
Expired / Lapsed
US
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Commutating devices
Assignee: TELE DYNAMICS Inc
•
Filing: 1955-04-29
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Granted: 1958-03-04
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Expires: 1975-04-29
Abstract
No abstract record available.
Inventors
- 👤 John J Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:14
CPC Classifications
H; H01; H01H; H01H19/00; H01H19/54; H01H19/56; H01H19/566; H01H1/00; H01H1/12; H01H1/14; H01H1/16; Y; Y10; Y10S; Y10S200/00; Y10S200/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US886225A
Cited
US923185A
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US1651314A
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US1694928A
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US2492727A
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US2634342A
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US2724025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |