Patent US3464321A successfully refreshed from Google Patents.
US3464321A
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US
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One-way directional fluid control valve and system
Assignee: BRUNO PIOTROWSKI JR
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Filing: 1966-11-29
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Granted: 1969-09-02
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Expires: 1986-11-29
Abstract
No abstract record available.
Inventors
- 👤 Bruno Piotrowski Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:21
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/08; F16; F16K; F16K11/00; F16K11/10; F15B2211/00; F15B2211/40; F15B2211/405; F15B2211/415; F15B2211/41527; F15B2211/41581; F15B2211/47; F15B2211/476; F15B2211/60; F15B2211/61; F15B2211/611; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA654091A
Cited
US1923205A
Cited
US2888909A
Cited
US2958339A
Cited
US2932167A
Cited
US3359995A
Cited
US3312510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |