Patent US2852628A successfully refreshed from Google Patents.
US2852628A
Expired / Lapsed
US
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Commutator device
Assignee: TELE DYNAMICS Inc
•
Filing: 1957-05-29
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Granted: 1958-09-16
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Expires: 1977-05-29
Abstract
No abstract record available.
Inventors
- 👤 Sedgwick T Fry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:01
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/004; H01H19/00; H01H19/54; H01H19/56; H01H19/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1224542A
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US1786391A
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US1805935A
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US2081184A
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US2535040A
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US2515768A
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US2604502A
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US2634342A
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US2695968A
Cited
US2821584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |