US3213397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical winding spool for electrical apparatus
Assignee: General Electric Co
•
Filing: 1961-04-28
•
Granted: 1965-10-19
•
Expires: 1981-04-28
Abstract
No abstract record available.
Inventors
- 👤 Broverman Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:30
CPC Classifications
H; H01; H01F; H01F5/00; H01F5/02; H01F27/00; H01F27/28; H01F27/32; H01F27/324; H01F27/325; H01F2005/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN COMBINATION, AN ELECTRICAL COIL AND A SPOOL FOR SUPPORTING SAID COIL, SAID SPOOL HAVING AN INTEGRAL RADIALLY EXTENDING CENTRAL FLANGE FORMED THEREON, SAID COIL BEING DISPOSED ON SAID SPOOL AND IN ABUTTING RELATIONSHIP TO THE SIDES OF SAID FLANGE, SAID FLANGE HAVING A STEPPED CONSTRUCTION PROVIDING GROOVES THEREIN, ALTERNATE ONES OF WHICH ARE OPEN ON OPPOSITE SIDES OF SAID FLANGE, TO PROVIDE COOLING DUCTS FOR SAID COIL, SAID GROOVES RADIALLY ACROSS SAID FLANGE, AND SAID SPOOL AND FLANGE BEING FORMED FROM ELECTRICAL INSULATING MATERIAL.
Claim 2
Dependent Claim
85 words
IN COMBINATION, AN ELECTRICAL COIL AND A SPOOL FOR SUPPORTING SAID COIL, SAID SPOOL HAVING AN INTEGRAL RADIALLY EXTENDING CENTRAL FLANGE FORMED THEREON, SAID COIL BEING DISPOSED ON SAID SPOOL AND IN ABUTTING RELATIONSHIP TO THE SIDES OF SAID FLANGE, SAID FLANGE HAVING A STEPPED CONSTRUCTION PROVIDING GROOVES THEREIN, ALTERNATE ONES OF WHICH ARE OPEN ON OPPOSITE SIDES OF SAID FLANGE, TO PROVIDE COOLING DUCTS FOR SAID COIL, SAID GROOVES RADIALLY ACROSS SAID FLANGE, AND SAID SPOOL AND FLANGE BEING FORMED FROM ELECTRICAL INSULATING 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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |