US2528422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid mixing control system
Assignee: Dole Valve Co
•
Filing: 1945-11-13
•
Granted: 1950-10-31
•
Expires: 1965-11-13
Abstract
No abstract record available.
Inventors
- 👤 Thomas B Chace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:27
CPC Classifications
D; D06; D06F; D06F34/00; D06F34/08; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2842; Y10T137/2856; Y10T137/6851; Y10T137/6855; Y10T137/6866; Y10T137/7287; Y10T137/7358; Y10T137/7368; Y10T137/7371; Y10T137/7374; Y10T137/8593; Y10T137/87571; Y10T137/87676; Y10T137/87684
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US390960A
Cited
US631741A
Cited
US775021A
Cited
US2188366A
Cited
FR824881A
Cited
US2269259A
Cited
US2296266A
Cited
US2321573A
Cited
US2381146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |