Patent US3199023A successfully refreshed from Google Patents.
US3199023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for nondestructively testing electrical insulation by sensing levels of ionization occurring in the insulation
Assignee: General Electric Co
•
Filing: 1959-11-27
•
Granted: 1965-08-03
•
Expires: 1979-11-27
Abstract
No abstract record available.
Inventors
- 👤 Bhupendrakumar V Bhimani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:23
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/20; G01R; G01R31/00; G01R31/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN A METHOD OF TESTING ELECTRICAL INSULATION WHEREIN AN UNDESIRABLE CHARGE BUILD-UP OCCURS IN THE INSULATION DUE TO THE TESTING THEREOF, THE STEPS WHICH CONSIST OF APPLYING A PREDETERMINED DIRECT CURRENT VOLTAGE ACROSS THE INSULATION, AT SOME PREDETERMINED TIME INTERVAL AFTER THE VOLTAGE HAS BEEN APPLIED SENSING A FIRST LEVEL OF IONIZATION OCCURRING IN THE INSULATION, AND INTERRUPTING THE APPLICATION OF THE VOLTAGE PRIOR TO DISRUPTIVE BREAKDOWN OF THE INSULATION BEING TESTED IN THE EVENT THAT ONLY IONIZATION ABOVE A PREDETERMINED SECOND LEVEL IS SENSED.
Claim 2
Dependent Claim
85 words
IN A METHOD OF TESTING ELECTRICAL INSULATION WHEREIN AN UNDESIRABLE CHARGE BUILD-UP OCCURS IN THE INSULATION DUE TO THE TESTING THEREOF, THE STEPS WHICH CONSIST OF APPLYING A PREDETERMINED DIRECT CURRENT VOLTAGE ACROSS THE INSULATION, AT SOME PREDETERMINED TIME INTERVAL AFTER THE VOLTAGE HAS BEEN APPLIED SENSING A FIRST LEVEL OF IONIZATION OCCURRING IN THE INSULATION, AND INTERRUPTING THE APPLICATION OF THE VOLTAGE PRIOR TO DISRUPTIVE BREAKDOWN OF THE INSULATION BEING TESTED IN THE EVENT THAT ONLY IONIZATION ABOVE A PREDETERMINED SECOND LEVEL IS SENSED.
References Cited (Backward Citations)
CA574067A
Cited
US1904598A
Cited
US2087783A
Cited
US2310335A
Cited
US2724087A
Cited
US2837714A
Cited
US2882491A
Cited
US2932791A
Cited
US2920270A
Cited
US3005150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |