Patent US2733660A successfully refreshed from Google Patents.
US2733660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic variable speed control
Assignee: —
•
Filing: —
•
Granted: 1956-02-07
•
Expires: 1973-02-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:25
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/02; F04D13/021; F04D13/024; F04D15/00; F04D15/0066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US414191A
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US872298A
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US762620A
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US841270A
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US998647A
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US1448401A
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US1444914A
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US1411145A
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US1811952A
Cited
US2219472A
Cited
US2276794A
Cited
US2292349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-06 | 1959-08-08 | 1960-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-06 | 1963-08-08 | 1964-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-06 | 1967-08-08 | 1968-02-07 | $7700.00 | Window Closed / Lapsed |