US2893709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for working material in at least two conical vessels
Assignee: Individual
•
Filing: 1956-10-25
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Granted: 1959-07-07
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Expires: 1976-10-25
Abstract
No abstract record available.
Inventors
- 👤 Nauta Johannes Ewardus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:16
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/80; B01F27/95; B01F27/953; B01F27/05; B01F27/11; B01F27/114; B01F27/1143; B01F27/23; B01F27/232; B01F27/2321; B01F27/2324
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) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |