US2728879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical coil
Assignee: General Electric Co
•
Filing: 1950-11-18
•
Granted: 1955-12-27
•
Expires: 1970-11-18
Abstract
No abstract record available.
Inventors
- 👤 Bror W Erikson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:58
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1326223A
Cited
US1352360A
Cited
US1695122A
Cited
US1837245A
Cited
US2130824A
Cited
US2165582A
Cited
GB561950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |