US2997526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus having insulation for eliminating creepage tracking
Assignee: General Electric Co
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Filing: 1957-01-09
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Granted: 1961-08-22
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Expires: 1977-01-09
Abstract
No abstract record available.
Inventors
- 👤 Alvan A Kessel
- 👤 Robert S Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:46
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/20; H01F38/22; H01F38/28; H01F38/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 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 BUTYL GUM WHICH TENDS TO FORM LOW RESISTANCE CARBONACEOUS DEPOSITS UNDER THE INFLUENCE OF CREEPAGE TYPE ELECTRICAL
Claim 2
Dependent Claim
65 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 BUTYL GUM WHICH TENDS TO FORM LOW RESISTANCE CARBONACEOUS DEPOSITS UNDER THE INFLUENCE OF CREEPAGE TYPE ELECTRICAL
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 |