US2808551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronous motor device
Assignee: Individual
•
Filing: 1954-02-03
•
Granted: 1957-10-01
•
Expires: 1974-02-03
Abstract
No abstract record available.
Inventors
- 👤 Morrison Montford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:12
CPC Classifications
G; G04; G04D; G04D7/00; G04D7/12; G04D7/1207; G04D7/1214
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE196402C
Cited
US2114859A
Cited
US1686638A
Cited
US1728554A
Cited
US1849645A
Cited
US2506766A
Cited
US2577190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |