US1819638A
Expired / Lapsed
US
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Magnet coil and method of making same
Assignee: INCA Manufacturing CORP
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Filing: 1929-12-16
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Granted: 1931-08-18
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Expires: 1949-12-16
Abstract
No abstract record available.
Inventors
- 👤 Robert A Connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:57
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071; Y10T83/00; Y10T83/768; Y10T83/7684; Y10T83/7709; Y10T83/7713; Y10T83/7718; Y10T83/7793; Y10T83/7797; Y10T83/7809; Y10T83/7822; Y10T83/7826
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1934-08-17 | 1935-02-16 | 1935-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-08-17 | 1939-02-16 | 1939-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-08-17 | 1943-02-16 | 1943-08-18 | $7700.00 | Window Closed / Lapsed |