US2502525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled cycle relief valve
Assignee: Phillips Petroleum Co
•
Filing: 1944-07-05
•
Granted: 1950-04-04
•
Expires: 1964-07-05
Abstract
No abstract record available.
Inventors
- 👤 Allen D Krugler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:32
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/048; F16K15/00; F16K15/02; F16K15/06; F16K15/063; F16K15/065; F16K15/066; F16K2200/00; F16K2200/40; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/6851; Y10T137/6855; Y10T137/6866; Y10T137/7722; Y10T137/7771; Y10T137/7781; Y10T137/7784; Y10T137/7837; Y10T137/7838; Y10T137/7842; Y10T137/7847; Y10T137/7904; Y10T137/7922; Y10T137/7924; Y10T137/8158; Y10T137/8326; Y10T137/8593; Y10T137/86187; Y10T137/86196
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2001353A
Cited
GB424528A
Cited
GB469399A
Cited
DE700679C
Cited
US2341579A
Cited
US2340747A
Cited
US2363960A
Cited
US2356410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |