Patent US1047719A successfully refreshed from Google Patents.
US3201734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformer core and winding
Assignee: Federal Pacific Electric Co
•
Filing: 1960-08-03
•
Granted: 1965-08-17
•
Expires: 1980-08-03
Abstract
No abstract record available.
Inventors
- 👤 Andrew A Halacsy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:23
CPC Classifications
H; H01; H01F; H01F30/00; H01F30/06; H01F30/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
AN ELECTRICAL TRANSFORMER HAVING A TOROIDAL WINDING OF STEEL STRIP FORMING A MAGNETIC CORE, THE WIDE FACE OF THE STRIP BEING PARALLEL TO THE TOROIDAL AXIS, AND A WINDING OF WIRE EXTENDING AROUND SAID CORE, SAID CORE AND WINDING GENERATING AN ESSENTIALLY ELLIPTICAL CROSS SECTION, THE MAJOR AXIS OF THE ELLIPSE BEING PARALLEL TO THE AXIS OF THE TOROIDAL CORE, AND THE RATIO OF THE MAJOR AXIS OF THE ELLIPSE TO ITS MINOR AXIS BEING BETWEEN 2 AND 3.6.
Claim 2
Dependent Claim
79 words
AN ELECTRICAL TRANSFORMER HAVING A TOROIDAL WINDING OF STEEL STRIP FORMING A MAGNETIC CORE, THE WIDE FACE OF THE STRIP BEING PARALLEL TO THE TOROIDAL AXIS, AND A WINDING OF WIRE EXTENDING AROUND SAID CORE, SAID CORE AND WINDING GENERATING AN ESSENTIALLY ELLIPTICAL CROSS SECTION, THE MAJOR AXIS OF THE ELLIPSE BEING PARALLEL TO THE AXIS OF THE TOROIDAL CORE, AND THE RATIO OF THE MAJOR AXIS OF THE ELLIPSE TO ITS MINOR AXIS BEING BETWEEN 2 AND 3.6.
References Cited (Backward Citations)
US2899631A
Cited
US546476A
Cited
US1421899A
Cited
US513420A
Cited
US1623345A
Cited
US853943A
Cited
US1102513A
Cited
US1362138A
Cited
US1320980A
Cited
US1503977A
Cited
US1531681A
Cited
US2401984A
Cited
US2348325A
Cited
GB670014A
Cited
US2780787A
Cited
US2783441A
Cited
US2896182A
Cited
US2863130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |