Patent US3495543A successfully refreshed from Google Patents.
US3495543A
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US
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Hydraulic apparatus
Assignee: Boulton Paul Aircraft Ltd
•
Filing: 1967-11-27
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Granted: 1970-02-17
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Expires: 1987-11-27
Abstract
No abstract record available.
Inventors
- 👤 Dennis J Millard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:18
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/20; F04B1/2014; F04B1/2035; F01; F01B; F01B3/00; F01B3/0032; F01B3/0035; F01B3/0044; F01B3/0064; F01B3/0067; F01B3/007; F01B3/0073; F04B1/122; F04B1/124; F04B1/2042; F04B1/2064; F04B1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1632495A
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DE552903C
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US2342186A
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US2296620A
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US3277834A
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US3191543A
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US3200762A
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GB1002872A
Cited
US3265008A
Cited
US3356037A
Cited
US3407745A
Cited
US3386389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |