US2670716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual range servomotor responsive to fluid pressure variations
Assignee: Ingersoll Rand Co
•
Filing: 1951-10-20
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Granted: 1954-03-02
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Expires: 1971-10-20
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Worster
- 👤 Clyde E Holvenstot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:56
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/02; F15B9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1141975A
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US1585529A
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GB295290A
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US2020847A
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US2153381A
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US2353610A
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US2418129A
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US2411747A
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US2486047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |