US2710018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brine valve construction for water softening systems
Assignee: DURO CO
•
Filing: 1952-01-29
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Granted: 1955-06-07
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Expires: 1972-01-29
Abstract
No abstract record available.
Inventors
- 👤 Wolfe H Hix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:28
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/20; F16K31/24; F16K31/26; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7365; Y10T137/7381; Y10T137/74; Y10T137/7413
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US434211A
Cited
US1576855A
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US1889231A
Cited
US1851927A
Cited
GB528672A
Cited
US2541622A
Cited
US2558471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-06 | 1958-12-06 | 1959-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-06 | 1962-12-06 | 1963-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-06 | 1966-12-06 | 1967-06-07 | $7700.00 | Window Closed / Lapsed |