Patent US5677276A successfully refreshed from Google Patents.
Patent US3234493A successfully refreshed from Google Patents.
US3234493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distribution transformer having a molded insulative casing and oil dielectric
Assignee: McGraw Edison Co
•
Filing: 1963-06-17
•
Granted: 1966-02-08
•
Expires: 1983-06-17
Abstract
No abstract record available.
Inventors
- 👤 Martin I Zwelling
- 👤 Reber Hubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:04
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/08; H01F27/10; H01F27/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
AN ENCASED ELECTRICAL DISTRIBUTION TRANSFORMER COMPRISING, IN COMBINATION, A TRANSFORMER CORE AND COIL ASSEMBLY INCLUDING A MAGNETIC CORE HAVING A WINDING LEG SURROUNDED BY AND ELECTICAL COIL AND YOKES JOINED TO SAID WINDING LEG, A HERMETICALLY SEALED CASING ENCLOSING SAID CORE AND COIL ASSEMBLY, SAID CASING INCLUDING TWO SIMILAR HOLLOW SHELLS OF INSULATING MATERIAL COMPLEMENTARY TO AND GERERALLY CONFORMING TO THE CONTOUR OF SAID COIL AND SAID YOKES AND ALSO HAVING ABUTTING PERIPHERAL EDGES HERMETICALLY SEALED TOGETHER, LIQUID DIELECTRIC WITHIN SAID CASING COVERING SAID CORE AND COIL ASSEMBLY, AND MOUNTING MEANS ENGAGING SAID YOKES FOR CLAMPING SAID CORE AND COIL ASSEMBLY AGAINST MOVEMENT RELATIVE TO SAID CASING AND IN SPACED RELATION TO SAID SHELLS, WHEREBY A MINIMUM OF LIQUID DIELECTRIC IS REQUIRED WITHIN SAID CASING.
Claim 2
Dependent Claim
125 words
AN ENCASED ELECTRICAL DISTRIBUTION TRANSFORMER COMPRISING, IN COMBINATION, A TRANSFORMER CORE AND COIL ASSEMBLY INCLUDING A MAGNETIC CORE HAVING A WINDING LEG SURROUNDED BY AND ELECTICAL COIL AND YOKES JOINED TO SAID WINDING LEG, A HERMETICALLY SEALED CASING ENCLOSING SAID CORE AND COIL ASSEMBLY, SAID CASING INCLUDING TWO SIMILAR HOLLOW SHELLS OF INSULATING MATERIAL COMPLEMENTARY TO AND GERERALLY CONFORMING TO THE CONTOUR OF SAID COIL AND SAID YOKES AND ALSO HAVING ABUTTING PERIPHERAL EDGES HERMETICALLY SEALED TOGETHER, LIQUID DIELECTRIC WITHIN SAID CASING COVERING SAID CORE AND COIL ASSEMBLY, AND MOUNTING MEANS ENGAGING SAID YOKES FOR CLAMPING SAID CORE AND COIL ASSEMBLY AGAINST MOVEMENT RELATIVE TO SAID CASING AND IN SPACED RELATION TO SAID SHELLS, WHEREBY A MINIMUM OF LIQUID DIELECTRIC IS REQUIRED WITHIN SAID CASING.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |