US2685259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve chamber for concrete pumps
Assignee: Chain Belt Co
•
Filing: 1950-10-02
•
Granted: 1954-08-03
•
Expires: 1970-10-02
Abstract
No abstract record available.
Inventors
- 👤 Charles I Longenecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:05
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/08; F16K11/085; F16K11/0853; F04; F04B; F04B1/00; F04B1/02; F04B15/00; F04B15/02; F04B15/023; F04B7/00; F04B7/0019; F04B7/0026; Y; Y10; Y10S; Y10S417/00; Y10S417/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1228469A
Cited
US2017975A
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US2056902A
Cited
US2123591A
Cited
US2141428A
Cited
US2319347A
Cited
US2319574A
Cited
US2448104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |