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US1139201A
Expired / Lapsed
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Direct-current dynamo-machine.
Assignee: Krupp Stahl AG
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Filing: 1910-12-05
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Granted: 1915-05-11
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Expires: 1930-12-05
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm Luyken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:26
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/16; H02K19/26; H02P; H02P9/00; H02P9/14
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) | 1918-05-10 | 1918-11-09 | 1919-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1922-05-10 | 1922-11-09 | 1923-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1926-05-10 | 1926-11-09 | 1927-05-11 | $7700.00 | Window Closed / Lapsed |