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US674840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit-controller.
Assignee: Siemens and Halske Electric Company of America
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Filing: 1900-03-10
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Granted: 1901-05-21
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Expires: 1920-03-10
Abstract
No abstract record available.
Inventors
- 👤 Carl Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:43
CPC Classifications
F; F04; F04B; F04B41/00; F04B41/02
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) | 1904-05-20 | 1904-11-19 | 1905-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-05-20 | 1908-11-19 | 1909-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-05-20 | 1912-11-19 | 1913-05-21 | $7700.00 | Window Closed / Lapsed |