Patent US919458A successfully refreshed from Google Patents.
US919458A
Expired / Lapsed
US
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Field-pole for dynamo-electric machines.
Assignee: Individual
•
Filing: 1906-03-09
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Granted: 1909-04-27
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Expires: 1926-03-09
Abstract
No abstract record available.
Inventors
- 👤 Heinrich Poth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:57
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/12; H02K1/14; H02K1/146; H02K1/148
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) | 1912-04-26 | 1912-10-26 | 1913-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-04-26 | 1916-10-26 | 1917-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-04-26 | 1920-10-26 | 1921-04-27 | $7700.00 | Window Closed / Lapsed |