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Patent US735170A successfully refreshed from Google Patents.
US735170A
Expired / Lapsed
US
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Electromagnetic switch for electric railways.
Assignee: General Electric Co
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Filing: 1901-05-01
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Granted: 1903-08-04
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Expires: 1921-05-01
Abstract
No abstract record available.
Inventors
- 👤 Samuel B Stewart Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:59
CPC Classifications
B; B60; B60M; B60M1/00; B60M1/02; B60M1/08
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) | 1906-08-03 | 1907-02-02 | 1907-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1910-08-03 | 1911-02-02 | 1911-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1914-08-03 | 1915-02-02 | 1915-08-04 | $7700.00 | Window Closed / Lapsed |