US2997527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus having insulation for eliminating creepage tracking
Assignee: General Electric Co
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Filing: 1958-02-14
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Granted: 1961-08-22
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Expires: 1978-02-14
Abstract
No abstract record available.
Inventors
- 👤 Alvan A Kessel
- 👤 Robert S Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:23
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/20; H01F38/22; H01F38/28; H01F38/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
ELECTRICAL APPARATUS COMPRISING AT LEAST TWO SPACED ELECTRICALLY CONDUCTING MEMBERS BETWEEN WHICH ELECTRICAL POTENTIALS MAY BE DEVELOPED, AN ORGANIC INSULATING MATERIAL DISPOSED AND COMPLETELY FILLING THE SPACE BETWEEN SAID MEMBERS AND HAVING AN OUTER SURFACE INTERMEDIATE SAID MEMBERS EXPOSED TO AMBIENT CONTAMINATING ATMOSPHERIC CONDITIONS, SAID SURFACE MATERIAL COMPRISING EPOXY RESIN WHICH TENDS TO FORM LOW RESISTANCE CARBONACEOUS DEPOSITS UNDER THE INFLUENCE OF CREEPAGE TYPE ELECTRICAL DISCHARGES OCCURRING UNDER CONTAMINATING CONDITIONS AND MEANS FOR PREVENTING THE FORMATION OF SAID CARBONACEOUS DEPOSITS DUE TO CREEPAGE, SAID MEANS COMPRISING HYDRATED ALUMINA INTERSPERSED IN SAID SURFACE MATERIAL IN THE AMOUNT OF FROM 20 TO 70 PERCENT BASED ON THE WEIGHT OF SAID SURFACE MATERIAL AND HYDRATED ALUMINA.
Claim 2
Dependent Claim
113 words
ELECTRICAL APPARATUS COMPRISING AT LEAST TWO SPACED ELECTRICALLY CONDUCTING MEMBERS BETWEEN WHICH ELECTRICAL POTENTIALS MAY BE DEVELOPED, AN ORGANIC INSULATING MATERIAL DISPOSED AND COMPLETELY FILLING THE SPACE BETWEEN SAID MEMBERS AND HAVING AN OUTER SURFACE INTERMEDIATE SAID MEMBERS EXPOSED TO AMBIENT CONTAMINATING ATMOSPHERIC CONDITIONS, SAID SURFACE MATERIAL COMPRISING EPOXY RESIN WHICH TENDS TO FORM LOW RESISTANCE CARBONACEOUS DEPOSITS UNDER THE INFLUENCE OF CREEPAGE TYPE ELECTRICAL DISCHARGES OCCURRING UNDER CONTAMINATING CONDITIONS AND MEANS FOR PREVENTING THE FORMATION OF SAID CARBONACEOUS DEPOSITS DUE TO CREEPAGE, SAID MEANS COMPRISING HYDRATED ALUMINA INTERSPERSED IN SAID SURFACE MATERIAL IN THE AMOUNT OF FROM 20 TO 70 PERCENT BASED ON THE WEIGHT OF SAID SURFACE MATERIAL AND HYDRATED ALUMINA.
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) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |