US2705299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor driven constant speed drive
Assignee: Individual
•
Filing: 1953-11-19
•
Granted: 1955-03-29
•
Expires: 1973-11-19
Abstract
No abstract record available.
Inventors
- 👤 Castagna John Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:53
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/066; Y; Y10; Y10S; Y10S388/00; Y10S388/923; Y10S388/924; Y10S388/927
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1085266A
Cited
US1508827A
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US2143920A
Cited
US2241483A
Cited
US2295305A
Cited
US2557208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-28 | 1958-09-27 | 1959-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-28 | 1962-09-27 | 1963-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-28 | 1966-09-27 | 1967-03-29 | $7700.00 | Window Closed / Lapsed |