US3457941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unloader valve
Assignee: Hypro LLC
•
Filing: 1965-10-04
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Granted: 1969-07-29
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Expires: 1985-10-04
Abstract
No abstract record available.
Inventors
- 👤 Ernest E Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:53
CPC Classifications
F; F15; F15B; F15B1/00; F15B1/02; F04; F04B; F04B49/00; F04B49/02; F04B49/03; F04B49/035; F04C; F04C14/00; F16; F16K; F16K17/00; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2622
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |