US3113374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making spiral electromagnetic coils
Assignee: GTE Sylvania Inc
•
Filing: 1953-12-30
•
Granted: 1963-12-10
•
Expires: 1973-12-30
Abstract
No abstract record available.
Inventors
- 👤 Zack Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:55
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071; Y10T29/49073
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
THE METHOD OF MAKING SPIRAL ELECTROMAGNETIC COILS, SAID METHOD COMPRISING: WINDING AN INSULATED SHEET OF FOIL ONTO A CORE, THEN ROTATING THE RESULTANT WINDING WHILE ADVANCING A THIN KNIFE BLADE INTO IT, IN WHICH THE KNIFE BLADE IS ADVANCED THE RADIAL DISTANCE BETWEEN THE CENTER LINES OF ADJACENT TURNS, FOR EACH ROTATION OF THE RESULTANT WINDING.
Claim 2
Independent Claim
56 words
THE METHOD OF MAKING SPIRAL ELECTROMAGNETIC COILS, SAID METHOD COMPRISING: WINDING AN INSULATED SHEET OF FOIL ONTO A CORE, THEN ROTATING THE RESULTANT WINDING WHILE ADVANCING A THIN KNIFE BLADE INTO IT, IN WHICH THE KNIFE BLADE IS ADVANCED THE RADIAL DISTANCE BETWEEN THE CENTER LINES OF ADJACENT TURNS, FOR EACH ROTATION OF THE RESULTANT WINDING.
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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) | 1966-12-09 | 1967-06-10 | 1967-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-09 | 1971-06-10 | 1971-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-09 | 1975-06-10 | 1975-12-10 | $7700.00 | Window Closed / Lapsed |