US2423264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Equalizing valve
Assignee: HYDRAULIC CONTROL ENGINEERING
•
Filing: 1943-04-28
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Granted: 1947-07-01
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Expires: 1963-04-28
Abstract
No abstract record available.
Inventors
- 👤 William T Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:09
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; F15B11/22; B; B66; B66F; B66F3/00; B66F3/46; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2524
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1923127A
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US1993790A
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US1999834A
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US2200578A
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US2242002A
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US2283266A
Cited
US2266921A
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US2317563A
Cited
GB549211A
Cited
US2374630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-30 | 1950-12-30 | 1951-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-30 | 1954-12-30 | 1955-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-30 | 1958-12-30 | 1959-07-01 | $7700.00 | Window Closed / Lapsed |