US2856639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of encasing electric coils
Assignee: Individual
•
Filing: 1953-04-13
•
Granted: 1958-10-21
•
Expires: 1973-04-13
Abstract
No abstract record available.
Inventors
- 👤 Bernard F Forrest
- 👤 Howenstine Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:44
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/12; H01F41/127; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071; Y10T29/49075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1326366A
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US1427324A
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US1888613A
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US1826297A
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US2286161A
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US2478633A
Cited
US2534119A
Cited
US2479400A
Cited
US2646535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |