US2672157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve structure for mixing valves
Assignee: Robertshaw Controls Co
•
Filing: 1950-06-08
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Granted: 1954-03-16
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Expires: 1970-06-08
Abstract
No abstract record available.
Inventors
- 👤 Charles D Branson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:31
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/10; F16K11/20; F16K11/24; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/789; Y10T137/8593; Y10T137/87571; Y10T137/87676; Y10T137/87684; Y10T137/87692; Y10T137/87917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1176212A
Cited
GB505916A
Cited
US2205334A
Cited
US2423281A
Cited
US2558161A
Cited
US2526099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |