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US3516333A
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Hydraulic torque amplifiers
Assignee: Pratt Precision Hydraulics Ltd
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Filing: 1968-03-11
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Granted: 1970-06-23
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Expires: 1988-03-11
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:34
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/02; F15B9/08; F15B9/12; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US786652A
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US2311010A
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FR1023003A
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US2941514A
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US3185439A
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US3216331A
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US3285141A
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US3310284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |