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Patent US3539853A successfully refreshed from Google Patents.
US3539853A
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Heat transfer arrangement for magnetic poles in electromagnetic devices
Assignee: Westinghouse Electric Corp
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Filing: 1968-10-30
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Granted: 1970-11-10
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Expires: 1988-10-30
Abstract
No abstract record available.
Inventors
- 👤 Christie J Photiadis
- 👤 Gordon P Gibson
- 👤 Adalbert G Posluszny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:28
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/12; H02K1/18; H02K1/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2279014A
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US2668925A
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US3024392A
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US2953699A
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US3184807A
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GB904055A
Cited
US3151260A
Cited
US3320660A
Cited
US3416235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |