Patent US3399646A successfully refreshed from Google Patents.
Patent US2603231A successfully refreshed from Google Patents.
US2603231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure relief valve
Assignee: —
•
Filing: —
•
Granted: 1952-07-15
•
Expires: 1969-07-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:21
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/08; F16K17/085; F16K15/00; F16K15/02; F16K15/04; F16K15/044; F16K17/0486; Y; Y10; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185; Y10T137/3294; Y10T137/3331; Y10T137/7722; Y10T137/7738; Y10T137/7781; Y10T137/7835; Y10T137/7836; Y10T137/7837; Y10T137/7866; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/794
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1312695A
Cited
US123546A
Cited
US112183A
Cited
US911379A
Cited
US1008816A
Cited
US1163236A
Cited
US1210913A
Cited
US1783646A
Cited
US1964616A
Cited
US2074292A
Cited
US2134803A
Cited
US2181969A
Cited
US2286713A
Cited
US2431457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |