Patent US2660701A successfully refreshed from Google Patents.
US2660701A
Expired / Lapsed
US
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Speed control of electric machines
Assignee: Individual
•
Filing: 1948-09-23
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Granted: 1953-11-24
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Expires: 1968-09-23
Abstract
No abstract record available.
Inventors
- 👤 Pestarini Joseph Maximus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:08
CPC Classifications
H; H02; H02P; H02P25/00; H02P25/16; H02P25/24; H02P25/26; H02P23/00; H02P23/08; H02P21/00; H02P21/06; H02P21/08; H02P21/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1637393A
Cited
US1479174A
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US1598268A
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US1481705A
Cited
US1709120A
Cited
US1962030A
Cited
US1967107A
Cited
US2106014A
Cited
US2344828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |