Patent US3270307A successfully refreshed from Google Patents.
US3270307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated magnetic core joint structure
Assignee: Individual
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Filing: 1963-11-12
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Granted: 1966-08-30
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Expires: 1983-11-12
Abstract
No abstract record available.
Inventors
- 👤 Jean Maxime Louis Emile
- 👤 Jean Michel Marcel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:03
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/24; H01F27/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A LAMINATED MAGNETIC CIRCUIT FOR ELECTRICAL DEVICES, SUCH AS TRANSFORMERS, COMPRISING AT LEAST ONE POLYGONAL FRAME MEMBER HAVING A PLURALITY OF BRANCHES EACH DEFINING ONE SIDE OF SAID MEMBER, EACH OF SAID BRANCHES BEING COMPOSED OF A PLURALITY OF STACKED SHEETS, EACH HAVING A SHORT INNER LONGITUDINAL EDGE, A LONG OUTER LONGITUDINAL EDGE, AND TWO LATERAL EDGES, WITH EACH SAID SHEET IN EACH SAID BRANCH BEING COPLANAR WITH A CORRESPONDING SHEET IN EVERY OTHER ONE OF SAID BRANCHES, AND WITH EACH LATERAL EDGE OF EACH SAID SHEET ABUTTING AGAINST THE ADJACENT LATERAL EDGE OF THE CORRESPONDING SHEET IN A RESPECTIVE ADJACENT ONE OF SAID BRANCHES TO FORM A JOINT, EACH SAID LATERAL EDGE DEFINING SAID JOINT HAVING A STAIRCASE CONFIGURATION DEFINED BY A PLURALITY OF SUCCESSIVE STRAIGHT EDGE SECTIONS, WITH EVERY OTHER ONE OF SAID SECTIONS EXTENDING PARALLEL TO THE LONGITUDINAL DIMENSION OF ONE OF THE SHEETS WHOSE LATERAL EDGE DEFINES SAID JOINT AND THE REMAINING ONES OF SAID SECTIONS EXTENDING PARALLEL TO THE LONGITUDINAL DIMENSION OF THE OTHER ONE OF SAID SHEETS WHOSE LATERAL EDGE DEFINES SAID JOINT.
Claim 2
Dependent Claim
179 words
A LAMINATED MAGNETIC CIRCUIT FOR ELECTRICAL DEVICES, SUCH AS TRANSFORMERS, COMPRISING AT LEAST ONE POLYGONAL FRAME MEMBER HAVING A PLURALITY OF BRANCHES EACH DEFINING ONE SIDE OF SAID MEMBER, EACH OF SAID BRANCHES BEING COMPOSED OF A PLURALITY OF STACKED SHEETS, EACH HAVING A SHORT INNER LONGITUDINAL EDGE, A LONG OUTER LONGITUDINAL EDGE, AND TWO LATERAL EDGES, WITH EACH SAID SHEET IN EACH SAID BRANCH BEING COPLANAR WITH A CORRESPONDING SHEET IN EVERY OTHER ONE OF SAID BRANCHES, AND WITH EACH LATERAL EDGE OF EACH SAID SHEET ABUTTING AGAINST THE ADJACENT LATERAL EDGE OF THE CORRESPONDING SHEET IN A RESPECTIVE ADJACENT ONE OF SAID BRANCHES TO FORM A JOINT, EACH SAID LATERAL EDGE DEFINING SAID JOINT HAVING A STAIRCASE CONFIGURATION DEFINED BY A PLURALITY OF SUCCESSIVE STRAIGHT EDGE SECTIONS, WITH EVERY OTHER ONE OF SAID SECTIONS EXTENDING PARALLEL TO THE LONGITUDINAL DIMENSION OF ONE OF THE SHEETS WHOSE LATERAL EDGE DEFINES SAID JOINT AND THE REMAINING ONES OF SAID SECTIONS EXTENDING PARALLEL TO THE LONGITUDINAL DIMENSION OF THE OTHER ONE OF SAID SHEETS WHOSE LATERAL EDGE DEFINES SAID JOINT.
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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |