US1100280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for indicating the speed of electric motors.
Assignee: General Electric Co
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Filing: 1909-09-22
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Granted: 1914-06-16
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Expires: 1929-09-22
Abstract
No abstract record available.
Inventors
- 👤 Ernst F W Alexanderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:12
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48
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) | 1917-06-15 | 1917-12-15 | 1918-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1921-06-15 | 1921-12-15 | 1922-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1925-06-15 | 1925-12-15 | 1926-06-16 | $7700.00 | Window Closed / Lapsed |