Patent US4673734A successfully refreshed from Google Patents.
US3201728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporative cooled inductive apparatus having cast solid insulation with cooling ducts formed therein
Assignee: Westinghouse Electric Corp
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Filing: 1962-08-23
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Granted: 1965-08-17
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Expires: 1982-08-23
Abstract
No abstract record available.
Inventors
- 👤 James H Mcwhirter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:38
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/08; H01F27/10; H01F27/18; H01F27/28; H01F27/2876; H01F27/32; H01F27/327; H01F2027/328; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN ELECTRICAL APPARATUS, A WINDING ASSEMBLY HAVING ELECTRICAL COILS, INSULATING MEANS COMPRISING THERMOSETTING RESIN, SAID ELECTRICAL COILS BEING EMBEDDED IN SAID INSULATING MEANS, COOLING DUCTS FORMED IN SAID THEROSETTING RESIN, WITH SAID THERMOSETTING RESIN EXTENDING FROM SAID ELECTRICAL COILS TO SAID COOLING DUCTS AND FORMING THE WALLS OF SAID COOLING DUCTS, FLUID COOLING MEANS DISPOSED WITHIN SAID COOLING DUCTS, HEAT EXCHANGER MEANS, MEANS PROVIDING A CLOSED CIRCUIT BETWEEN SAID COOLING DUCTS AND SAID HEAT EXCHANGER MEANS TO CONFINE SAID FLUID COOLING MEANS TO SAID COOLING DUCTS AND HEAT EXCHANGER MEANS, SAID FLUID COOLING MEANS COOLING THE ELECTRICAL APPARATUS BY CIRCULATION BETWEEN SAID COOLING DUCTS AND SAID HEAT EXCHANGER MEANS.
Claim 2
Dependent Claim
109 words
IN ELECTRICAL APPARATUS, A WINDING ASSEMBLY HAVING ELECTRICAL COILS, INSULATING MEANS COMPRISING THERMOSETTING RESIN, SAID ELECTRICAL COILS BEING EMBEDDED IN SAID INSULATING MEANS, COOLING DUCTS FORMED IN SAID THEROSETTING RESIN, WITH SAID THERMOSETTING RESIN EXTENDING FROM SAID ELECTRICAL COILS TO SAID COOLING DUCTS AND FORMING THE WALLS OF SAID COOLING DUCTS, FLUID COOLING MEANS DISPOSED WITHIN SAID COOLING DUCTS, HEAT EXCHANGER MEANS, MEANS PROVIDING A CLOSED CIRCUIT BETWEEN SAID COOLING DUCTS AND SAID HEAT EXCHANGER MEANS TO CONFINE SAID FLUID COOLING MEANS TO SAID COOLING DUCTS AND HEAT EXCHANGER MEANS, SAID FLUID COOLING MEANS COOLING THE ELECTRICAL APPARATUS BY CIRCULATION BETWEEN SAID COOLING DUCTS AND SAID HEAT EXCHANGER MEANS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |