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Patent US1807218A successfully refreshed from Google Patents.
US1807218A
Expired / Lapsed
US
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Electric machine
Assignee: Alcatel Lucent Deutschland AG
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Filing: 1928-04-10
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Granted: 1931-05-26
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Expires: 1948-04-10
Abstract
No abstract record available.
Inventors
- 👤 Langewiesche Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:19
CPC Classifications
H; H02; H02K; H02K47/00; H02K47/02; H02K19/00; H02K19/16; H02K19/34
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) | 1934-05-25 | 1934-11-24 | 1935-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-05-25 | 1938-11-24 | 1939-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-05-25 | 1942-11-24 | 1943-05-26 | $7700.00 | Window Closed / Lapsed |