US2786608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-clogging outlet valve for tank for mixing cementitious materials
Assignee: Individual
•
Filing: 1954-11-01
•
Granted: 1957-03-26
•
Expires: 1974-11-01
Abstract
No abstract record available.
Inventors
- 👤 Brown Warren Durand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:32
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/02; F16K7/04; F16K7/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US600552A
Cited
US1392601A
Cited
US1660242A
Cited
US2113022A
Cited
US2305840A
Cited
US2608393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-25 | 1960-09-24 | 1961-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-25 | 1964-09-24 | 1965-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-25 | 1968-09-24 | 1969-03-26 | $7700.00 | Window Closed / Lapsed |