US3445345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extractive distillation of c1 to c3 alcohols and subsequent distillation of purge streams
Assignee: RAPHAEL KATZEN ASSOCIATES
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Filing: 1968-05-08
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Granted: 1969-05-20
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Expires: 1988-05-08
Abstract
No abstract record available.
Inventors
- 👤 Raphael Katzen
- 👤 Vincent B Diebold
- 👤 George D Moon Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:56
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/32; B01D3/322; B01D3/001; C; C07; C07C; C07C29/00; C07C29/74; C07C29/76; C07C29/80; C07C29/84
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2638440A
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US2610141A
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US2801210A
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US2806816A
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US2910412A
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US2993840A
Cited
US3230156A
Cited
US3254024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |