US3235825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical coils and insulation systems therefor
Assignee: General Electric Co
•
Filing: 1963-01-02
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Granted: 1966-02-15
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Expires: 1983-01-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Paul W Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:47
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/32; H01F27/327; Y; Y10; Y10S; Y10S174/00; Y10S174/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
AN ELECTRICAL FLUORESCENT LAMP BALLAST COMPRISING A SHELL-TYPE MAGNETIC CORE HAVING A CENTER LEG AND TWO OUTER LEGS; FIRST AND SECOND CYANOETHYLATED PAPER SPOOLS POSITIONED ON SAID CENTER LEG; FIRST AND SECOND ELECTRICAL COILS RESPECTIVELY WOUND ON SAID FIRST AND SECOND SPOOLS, EACH OF SAID COILS HAVING A PLURALITY OF LAYERS EACH CONSISTING OF A PLURALITY OF TURNS OF POLYVINYL FORMAL RESIN INSULATED CONDUCTOR WIRE, AND EACH SUCCEEDING LAYER BEING WOUND WITHOUT ELECTRICAL SHEET INSULATION BETWEEN SAID SUCCEEDING LAYER AND THE ADJACENT PRECEDING LAYER; CYANOETHYLATED PAPER WOUND ABOUT SAID COILS; AND A REACTION MIXTURE IMPREGNATING AT LEAST SAID SPOOLS, SAID PAPER, AND SAID COILS,
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |