Patent US3229023A successfully refreshed from Google Patents.
US3229023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal upgrading of electrical apparatus
Assignee: General Electric Co
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Filing: 1963-10-21
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Granted: 1966-01-11
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Expires: 1983-10-21
Abstract
No abstract record available.
Inventors
- 👤 Michael J Bolton
- 👤 Thomas G Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:31
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/08; H01F27/10; H01F27/12; H01F27/14; Y; Y10; Y10S; Y10S55/00; Y10S55/31
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
91 words
ELECTRICAL APPARATUS COMPRISING A SEALED CONTAINER AT LEAST PARTIALLY FILLED WITH A DIELECTRIC FLUID AND ENCLOSING A HEAT-EVOLVING CONDUCTOR IMMERSED IN SAID FLUID, SAID CONTAINER HAVING AN APERTURE IN ONE WALL THEREOF AND CONTAINING A SOURCE OF WATER VAPOR UNDER HEAT-EVOLVING ELECTRICAL LOAD CONDITIONS, AND A WATER VAPOR PERMEABLE MEMBRANE CLOSING SAID APERTURE AND FORMED OF A MATERIAL SUBSTANTIALLY IMPERVIOUS TO GAS AND VAPOR OTHER THAN WATER VAPOR, SAID MEMBRANE SELECTIVELY EXHAUSTING WATER VAPOR FROM SAID CONTAINER WHENEVER WATER VAPOR PRESURE WITHIN SAID CONTAINER EXCEEDS THE EXTERNAL EMBIENT WATER VAPOR PRESSURE.
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |