US2211068A
Expired / Lapsed
US
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Method and apparatus for classifying solids
Assignee: ALBERT E VANDERCOCK
•
Filing: 1937-12-24
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Granted: 1940-08-13
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Expires: 1957-12-24
Abstract
No abstract record available.
Inventors
- 👤 Mcdonald Ernest Percy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:29
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/62; B03B5/623; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/4673; Y10T137/474; Y10T137/4891; Y10T137/7287; Y10T137/7313; Y10T137/7316; Y10T137/7319; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7788; Y10T137/7793; Y10T137/7809; Y10T137/782; Y10T137/7821; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7927; Y10T137/7929; Y10T137/7932; Y10T137/7933; Y10T137/8593; Y10T137/86187; Y10T137/86196; Y10T137/86493; Y10T137/86718
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-08-13 | 1944-02-12 | 1944-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-08-13 | 1948-02-12 | 1948-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-08-13 | 1952-02-12 | 1952-08-13 | $7700.00 | Window Closed / Lapsed |