Patent US764481A successfully refreshed from Google Patents.
US764481A
Expired / Lapsed
US
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Field-coil and method of making same.
Assignee: General Electric Co
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Filing: 1902-10-10
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Granted: 1904-07-05
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Expires: 1922-10-10
Abstract
No abstract record available.
Inventors
- 👤 Walter D Litchfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:39
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/52; H02K3/521; H02K3/522
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) | 1907-07-05 | 1908-01-04 | 1908-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1911-07-05 | 1912-01-04 | 1912-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1915-07-05 | 1916-01-04 | 1916-07-05 | $7700.00 | Window Closed / Lapsed |