Patent US3028446A successfully refreshed from Google Patents.
US3028446A
Expired / Lapsed
US
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Encapsulated coils and method of making
Assignee: Rea Magnet Wire Co Inc
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Filing: 1958-08-28
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Granted: 1962-04-03
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Expires: 1978-08-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry A Toulmin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:48
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/28; H01B7/2806; H01F; H01F5/00; H01F5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
AN ARTICLE OF MANUFACTURE COMPRISING SUPERPOSED TURNS OF AN ELECTRICAL CONDUCTOR FORMING A COIL AND HAVING INORGANIC FIBROUS ELECTRICAL INSULATION EXTENDING OVER THE CONDUCTOR INSULATING THE ADJACENT TURNS OF THE COIL, SAID INSULATION DEFINING WITH THE CONDUCTOR AN ANNULAR EXPANSION CAVITY, SAID CONDUCTOR COMPRISING AN ELONGATED CONDUCTIVE MASS OF A DEPOSIT OF CORROSION RESISTANT METAL DEPOSITED BY THE HEAT DECOMPOSITION OF A METAL BEARING GASEOUS COMPOUND, AND SAID FIBROUS INSULATION COMPRISING AN INNER LAYER OF HIGH SOFTENING POINT INSULATION MATERIAL AND AN OUTER LAYER OF LOWER SOFTENING POINT AND SINTERABLE MATERIAL.
Claim 2
Dependent Claim
91 words
AN ARTICLE OF MANUFACTURE COMPRISING SUPERPOSED TURNS OF AN ELECTRICAL CONDUCTOR FORMING A COIL AND HAVING INORGANIC FIBROUS ELECTRICAL INSULATION EXTENDING OVER THE CONDUCTOR INSULATING THE ADJACENT TURNS OF THE COIL, SAID INSULATION DEFINING WITH THE CONDUCTOR AN ANNULAR EXPANSION CAVITY, SAID CONDUCTOR COMPRISING AN ELONGATED CONDUCTIVE MASS OF A DEPOSIT OF CORROSION RESISTANT METAL DEPOSITED BY THE HEAT DECOMPOSITION OF A METAL BEARING GASEOUS COMPOUND, AND SAID FIBROUS INSULATION COMPRISING AN INNER LAYER OF HIGH SOFTENING POINT INSULATION MATERIAL AND AN OUTER LAYER OF LOWER SOFTENING POINT AND SINTERABLE MATERIAL.
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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) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |