Patent US2454734A successfully refreshed from Google Patents.
US2454734A
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Distillation of acetone, ethanol, and butanol from aqueous solutions thereof
Assignee: Commercial Solvents Great Britain Ltd
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Filing: 1947-11-21
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Granted: 1948-11-23
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Expires: 1967-11-21
Abstract
No abstract record available.
Inventors
- 👤 Darlington Harold Nunnerley
- 👤 Holdsworth Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:50
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74; C07C29/76; C07C29/80; C07C45/00; C07C45/78; C07C45/81; C07C45/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2095347A
Cited
US2080194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-23 | 1952-05-24 | 1952-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-23 | 1956-05-24 | 1956-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-23 | 1960-05-24 | 1960-11-23 | $7700.00 | Window Closed / Lapsed |