US3271710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling systems for underground transformers
Assignee: Westinghouse Electric Corp
•
Filing: 1964-03-06
•
Granted: 1966-09-06
•
Expires: 1984-03-06
Abstract
No abstract record available.
Inventors
- 👤 Merrill G Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:16
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/08; H01F27/085; H01F27/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN COMBINATION, AN ENCLOSURE; ELECTRICAL INDUCTIVE APPARATUS DISPOSED WITHIN SAID ENCLOSURE; A COVER HAVING A SLOPING SIDE PORTION FORMING A SUBSTANTIALLY DOEM SHAPE, WITH ITS SIDE PORTION SLOPING INWARDLY FROM THE BOTTOM PORTION OF SAID COVER TO ITS TOP PORTION; SAID COVER BEING DISPOSED OVER SAID ENCLOSURE; SAID COVER HAVING AT LEAST ONE OPENING DISPOSED NEAR ITS TOP PORTION, AND AT LEAST ONE OPENING DISPOSED NEAR ITS BOTTOM PORTION, WITH SAID AT LEAST ONE OPENING DISPOSED NEAR ITS BOTTOM PORTION BEING DISPOSED IN THE SIDE PORTION OF SAID COVER; AND DUCT MEANS EXTENDING DOWNWARDLY FROM SAID AT LEAST ONE OPENING NEAR THE BOTTOM PORTION OF SAID COVER TO THE LOWER PORTION OF SAID ENCLOSURE; SAID ELECTRICAL INDUCTIVE APPARATUS HEATING THE SURROUNDING AIR WHEN ENERGIZED AND STARTING AIR CIRCULATION, WITH THE AIR HEATED BY SAID INDUCTIVE APPARATUS RISING AND BEING DISCHARGED THROUGH SAID
Claim 2
Dependent Claim
142 words
IN COMBINATION, AN ENCLOSURE; ELECTRICAL INDUCTIVE APPARATUS DISPOSED WITHIN SAID ENCLOSURE; A COVER HAVING A SLOPING SIDE PORTION FORMING A SUBSTANTIALLY DOEM SHAPE, WITH ITS SIDE PORTION SLOPING INWARDLY FROM THE BOTTOM PORTION OF SAID COVER TO ITS TOP PORTION; SAID COVER BEING DISPOSED OVER SAID ENCLOSURE; SAID COVER HAVING AT LEAST ONE OPENING DISPOSED NEAR ITS TOP PORTION, AND AT LEAST ONE OPENING DISPOSED NEAR ITS BOTTOM PORTION, WITH SAID AT LEAST ONE OPENING DISPOSED NEAR ITS BOTTOM PORTION BEING DISPOSED IN THE SIDE PORTION OF SAID COVER; AND DUCT MEANS EXTENDING DOWNWARDLY FROM SAID AT LEAST ONE OPENING NEAR THE BOTTOM PORTION OF SAID COVER TO THE LOWER PORTION OF SAID ENCLOSURE; SAID ELECTRICAL INDUCTIVE APPARATUS HEATING THE SURROUNDING AIR WHEN ENERGIZED AND STARTING AIR CIRCULATION, WITH THE AIR HEATED BY SAID INDUCTIVE APPARATUS RISING AND BEING DISCHARGED THROUGH SAID
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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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |