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US2646975A
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Method for mixing concrete by gravitational vibration
Assignee: Individual
•
Filing: 1951-04-10
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Granted: 1953-07-28
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Expires: 1971-04-10
Abstract
No abstract record available.
Inventors
- 👤 Waldvogel Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:51
CPC Classifications
B; B28; B28C; B28C5/00; B28C5/48; B01; B01F; B01F31/00; B01F31/57
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) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |