US3247476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic device
Assignee: Intron International Inc
•
Filing: 1961-06-14
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Granted: 1966-04-19
•
Expires: 1981-06-14
Abstract
No abstract record available.
Inventors
- 👤 Robert H Pintell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:46
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/02; H04R7/12; H04R7/14; H01; H01F; H01F27/00; H01F27/28; H01F27/2804; H01F27/2847; H01F30/00; H01F30/02; H01F30/06; H01F30/10; H04R13/00; H04R9/00; H04R9/02; H04R9/04; H04R9/046; H04R9/047; H01F2027/2857; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49117; Y10T29/49124; Y10T29/49155; Y10T29/49162
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
AN ELECTROMAGNETIC TRANSFORMER COMPRISING TWO GENERALLY CYLINDRICAL SOLID BODIES WITH AXIALLY SPACED-APART END FACES, EACH OF SAID BODIES BEING COMPOSED SUBSTANTIALLY IN ITS ENTIRETY OF A SPIRAL STRIP HAVING TURNS CENTERED ON THE CYLINDER AXIS AND EXTENDING OUTWARDLY FROM THE VICINITY OF SAID AXIS, SAID STRIP CONSISTING SUBSTANTIALLY THROUGHOUT ITS LENGTH OF A MATERIAL WHICH IS AT LEAST IN PART MAGNETIZABLE AND AT LEAST IN PART CONDUCTIVE, EACH OF SAID TURNS HAVING A HIGH-RESISTANCE SURFACE PORTION WHEREBY ADJACENT TURNS ARE SUBSTANTIALLY INSULATED ELECTRICALLY FROM ONE ANOTHER; TWO FERROMAGNETIC CORES EACH EXTENDING FROM A RESPECTIVE END FACE OF ONE OF SAID BODIES TO A CORRESPONDING END FACE OF THE OTHER BODY AND COMPLEMENTING SAID BODIES IN FORMING THEREWITH A SUB-
Claim 2
Dependent Claim
119 words
AN ELECTROMAGNETIC TRANSFORMER COMPRISING TWO GENERALLY CYLINDRICAL SOLID BODIES WITH AXIALLY SPACED-APART END FACES, EACH OF SAID BODIES BEING COMPOSED SUBSTANTIALLY IN ITS ENTIRETY OF A SPIRAL STRIP HAVING TURNS CENTERED ON THE CYLINDER AXIS AND EXTENDING OUTWARDLY FROM THE VICINITY OF SAID AXIS, SAID STRIP CONSISTING SUBSTANTIALLY THROUGHOUT ITS LENGTH OF A MATERIAL WHICH IS AT LEAST IN PART MAGNETIZABLE AND AT LEAST IN PART CONDUCTIVE, EACH OF SAID TURNS HAVING A HIGH-RESISTANCE SURFACE PORTION WHEREBY ADJACENT TURNS ARE SUBSTANTIALLY INSULATED ELECTRICALLY FROM ONE ANOTHER; TWO FERROMAGNETIC CORES EACH EXTENDING FROM A RESPECTIVE END FACE OF ONE OF SAID BODIES TO A CORRESPONDING END FACE OF THE OTHER BODY AND COMPLEMENTING SAID BODIES IN FORMING THEREWITH A SUB-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |