Patent DE817266C successfully refreshed from Google Patents.
US2850707A
Expired / Lapsed
US
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Electromagnetic coils
Assignee: GTE Sylvania Inc
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Filing: 1954-04-15
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Granted: 1958-09-02
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Expires: 1974-04-15
Abstract
No abstract record available.
Inventors
- 👤 Wroblewski Theodore
- 👤 Zack Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:20
CPC Classifications
H; H01; H01F; H01F5/00; H01F5/06; H01F27/00; H01F27/24; H01F27/255; H01F41/00; H01F41/02; H01F41/0206; H01F41/0246
Claims Analysis
Total Claims: 0
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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) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |