Patent US3175173A successfully refreshed from Google Patents.
US3175173A
Expired / Lapsed
US
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Shielded electrical induction apparatus
Assignee: General Electric Co
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Filing: 1961-06-12
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Granted: 1965-03-23
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Expires: 1981-06-12
Abstract
No abstract record available.
Inventors
- 👤 Alanson U Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:24
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/33; H01F27/34; H01F27/36; H01F27/363; H01F30/00; H01F30/06; H01F30/08; H01F37/00; H01F37/005
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
IN COMBINATION: ELECTRICAL INDUCTION APPARATUS HAVING A MAGNETIC FLUX-PRODUCING MEMBER ENCLOSED IN A MAGNETIC METAL CONTAINER, AND A METALLIC EDDY CURRENT SHIELD INTERPOSED BETWEEN SAID CONTAINER AND SAID MEMBER, SAID SHIELD SURROUNDING SAID MEMBER AND BEING SYMMETRICALLY LOCATED WITH RESPECT THERETO; SAID SHIELD HAVING THE GEOMETRICAL CONFIGURATION OF A SPHERE TRUNCATED AT OPPOSITE POLES SO AS TO OPEN-ENDED, AND SAID SPHERE BEING ORIENTED SO THAT THE CENTER PORTION OF SAID SHIELD IS FARTHEST AWAY FROM SAID FLUX-PRODUCING MEMBER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |