Patent US2619913A successfully refreshed from Google Patents.
US2619913A
Expired / Lapsed
US
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Rotary concrete pump
Assignee: Chain Belt Co
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Filing: 1948-10-14
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Granted: 1952-12-02
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Expires: 1968-10-14
Abstract
No abstract record available.
Inventors
- 👤 Charles I Longenecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:44
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/30; F04C2/40; F04C2/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US48604A
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US549255A
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US2374445A
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US1012642A
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US1324260A
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FR590729A
Cited
US2168779A
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US2157141A
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US2151484A
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US2338112A
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US2247429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |