US3047935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making toroidal coils
Assignee: AT&T Inc
•
Filing: 1956-11-27
•
Granted: 1962-08-07
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Expires: 1976-11-27
Abstract
No abstract record available.
Inventors
- 👤 Lester O Reichelt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:48
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/06; H01F41/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2899631A
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GB267474A
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US2184272A
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US2229413A
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US2434511A
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US2455355A
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US2471869A
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US2765448A
Cited
US2713715A
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US2856639A
Cited
US2787769A
Cited
US2864064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-06 | 1966-02-05 | 1966-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-06 | 1970-02-05 | 1970-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-06 | 1974-02-05 | 1974-08-07 | $7700.00 | Window Closed / Lapsed |