Patent US2589012A successfully refreshed from Google Patents.
US2589012A
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US
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Valve for plastic concrete pressure pumps
Assignee: Chain Belt Co
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Filing: 1947-07-24
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Granted: 1952-03-11
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Expires: 1967-07-24
Abstract
No abstract record available.
Inventors
- 👤 Charles I Longenecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:32
CPC Classifications
F; F04; F04B; F04B7/00; F04B7/0084; F04B7/0088; F04B7/0092; F16; F16K; F16K11/00; F16K11/02; F16K11/08; F16K11/085; F16K11/0853; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6161; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86638; Y10T137/86646
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1347351A
Cited
US1954018A
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US2084248A
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FR805137A
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US2169526A
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US2433732A
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US2384783A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |