Patent US3667018A successfully refreshed from Google Patents.
Patent US3500851A successfully refreshed from Google Patents.
US3500851A
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Fluid flow control devices
Assignee: ZF International UK Ltd
•
Filing: 1967-10-09
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Granted: 1970-03-17
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Expires: 1987-10-09
Abstract
No abstract record available.
Inventors
- 👤 Robert Thomas John Skinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:30
CPC Classifications
F; F15; F15B; F15B5/00; F15B5/003; F15C; F15C3/00; F15C3/10; F15C3/14; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2164; Y10T137/218; Y10T137/2202; Y10T137/2213; Y10T137/2273; Y10T137/8593; Y10T137/877; Y10T137/87788
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3022799A
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US3039490A
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US3223103A
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US3219048A
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US3362421A
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US3272215A
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US3276463A
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US3403692A
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US3336931A
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US3351080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |