Patent US2542237A successfully refreshed from Google Patents.
Patent US2524264A successfully refreshed from Google Patents.
US2524264A
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Regulator valve
Assignee: HYDRILL Corp
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Filing: 1947-04-28
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Granted: 1950-10-03
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Expires: 1967-04-28
Abstract
No abstract record available.
Inventors
- 👤 Granville S Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:29
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/02; E21B33/00; E21B33/02; E21B33/03; E21B33/06; G; G05; G05D; G05D16/00; G05D16/024; G05D16/028; G05D16/04; G05D16/10; G05D16/107; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607; Y10T137/261; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7809; Y10T137/7812; 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) | 1953-10-02 | 1954-04-03 | 1954-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-02 | 1958-04-03 | 1958-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-02 | 1962-04-03 | 1962-10-03 | $7700.00 | Window Closed / Lapsed |