Patent US2432671A successfully refreshed from Google Patents.
US2432671A
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US
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Grouting attachment for concrete pumps
Assignee: Chain Belt Co
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Filing: 1945-07-12
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Granted: 1947-12-16
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Expires: 1965-07-12
Abstract
No abstract record available.
Inventors
- 👤 Charles I Longenecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:47
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/22; F04B49/24; F04B15/00; F04B15/02; F04B15/023; F04B53/00; F04B53/10; F04B53/1002; F04B53/16; F04B53/162; Y; Y10; Y10S; Y10S417/00; Y10S417/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-15 | 1951-06-16 | 1951-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-15 | 1955-06-16 | 1955-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-15 | 1959-06-16 | 1959-12-16 | $7700.00 | Window Closed / Lapsed |