Patent US1363753A successfully refreshed from Google Patents.
US3274526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating core transformers
Assignee: High Voltage Engineering Corp
•
Filing: 1963-07-17
•
Granted: 1966-09-20
•
Expires: 1983-07-17
Abstract
No abstract record available.
Inventors
- 👤 Roy M Emanuelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:27
CPC Classifications
H; H01; H01F; H01F30/00; H01F30/06; H01F30/12; H05; H05G; H05G1/00; H05G1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
AN ELECTROMAGNETIC TRANSFORMER COMPRISING AT LEAST ONE PRIMARY COIL, AT LEAST TWO SECONDARY COILS SERIALLY ARRANGED IN OPERABLE RELATIONSHIP WITH EACH PRIMARY COIL, A CLOSED MAGNETIC CIRCUIT INCLUDING A PLURALITY OF GROOVED CORE SEGMENTS OF PERMEABLE MATERIAL, THERE BEING AT LEAST ONE CORE SEGMENT ASSOCIATED WITH EACH SECONDARY COIL, MEANS FOR INSULATING EACH CORE SEGMENT FROM ADJACENT SEGMENTS, A HERMETIC NON-METALLIC TANK ENCLOSING SAID ELECTROMAGNETIC TRANSFORMER, A PRESSURIZED INSULATING GAS ATMOSPHERE RESIDING THEREIN, FLUID COOLING MEANS DISPOSED
Claim 2
Dependent Claim
77 words
AN ELECTROMAGNETIC TRANSFORMER COMPRISING AT LEAST ONE PRIMARY COIL, AT LEAST TWO SECONDARY COILS SERIALLY ARRANGED IN OPERABLE RELATIONSHIP WITH EACH PRIMARY COIL, A CLOSED MAGNETIC CIRCUIT INCLUDING A PLURALITY OF GROOVED CORE SEGMENTS OF PERMEABLE MATERIAL, THERE BEING AT LEAST ONE CORE SEGMENT ASSOCIATED WITH EACH SECONDARY COIL, MEANS FOR INSULATING EACH CORE SEGMENT FROM ADJACENT SEGMENTS, A HERMETIC NON-METALLIC TANK ENCLOSING SAID ELECTROMAGNETIC TRANSFORMER, A PRESSURIZED INSULATING GAS ATMOSPHERE RESIDING THEREIN, FLUID COOLING MEANS DISPOSED
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |