US2644587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dewatering device for sand and the like
Assignee: Hydro Blast Corp
•
Filing: 1949-12-31
•
Granted: 1953-07-07
•
Expires: 1969-12-31
Abstract
No abstract record available.
Inventors
- 👤 Roderick S Webster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:15
CPC Classifications
B; B22; B22C; B22C5/00; B22C5/08; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/7287; Y10T137/7306; Y10T292/00; Y10T292/08; Y10T292/087; Y10T292/0871; Y10T292/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |