US2548733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for pumping concrete
Assignee: Chain Belt Co
•
Filing: 1947-08-29
•
Granted: 1951-04-10
•
Expires: 1967-08-29
Abstract
No abstract record available.
Inventors
- 👤 Charles I Longenecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:53
CPC Classifications
F; F04; F04B; F04B15/00; F04B15/02; F04B15/023; Y; Y10; Y10S; Y10S417/00; Y10S417/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US778878A
Cited
US1616783A
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US2131681A
Cited
US2254639A
Cited
US2394453A
Cited
US2360345A
Cited
US2344698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |