Patent US3543783A successfully refreshed from Google Patents.
US3543783A
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Flow control devices
Assignee: ZF International UK Ltd
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Filing: 1968-04-12
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Granted: 1970-12-01
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Expires: 1988-04-12
Abstract
No abstract record available.
Inventors
- 👤 Richard Joseph Ifield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:15
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/022; G; G05; G05D; G05D11/00; G05D11/003; G05D11/006; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2524; Y10T137/2559; Y10T137/2564; Y10T137/2574; Y10T137/2579; Y10T137/2599; Y10T137/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |