Patent US3441886A successfully refreshed from Google Patents.
US3441886A
Expired / Lapsed
US
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Rotary transformer with integral bearing
Assignee: SIDNEY HIMMELSTEIN
•
Filing: 1967-03-02
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Granted: 1969-04-29
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Expires: 1987-03-02
Abstract
No abstract record available.
Inventors
- 👤 Richard S Tveter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:52
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2432982A
Cited
US2615069A
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US2983832A
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US3016273A
Cited
US3159907A
Cited
US3317873A
Cited
US3302048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |