US2840106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic variable pressure relief valves
Assignee: Electraulic Presses Ltd
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Filing: 1953-08-13
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Granted: 1958-06-24
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Expires: 1973-08-13
Abstract
No abstract record available.
Inventors
- 👤 Towler Frank Hathorn
- 👤 Towler John Maurice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:14
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/06; F15; F15B; F15B2211/00; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50536; F15B2211/52; F15B2211/521; F15B2211/523; F15B2211/528; F15B2211/55; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7925
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) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |