US2593437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of unsaturated aldehydes
Assignee: Distillers Co Yeast Ltd
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Filing: 1949-08-12
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Granted: 1952-04-22
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Expires: 1969-08-12
Abstract
No abstract record available.
Inventors
- 👤 Goodings Eric Paul
- 👤 Hadley David James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:22
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; C07C45/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
PROCESS FOR THE MANUFACTURE OF AN UNSATURATED ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF ACROLEIN AND ALPHA-METHACROLEIN BY THE CATALYTIC OXIDATION OF THE CORRESPONDING OLEFINES PROPYLENE AND ISOBUTENE RESPECTIVELY WHICH COMPRISES PASSING THE OLEFINE WITH MOLECULAR OXYGEN CONTAINING GASES AT TEMPERATURES BETWEEN 200* AND 400*C. IN THE PRESENCE OF ELEMENTARY SELENIUM IN THE REACTION ZONE OVER A CONTACT MATERIAL CONTAINING AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF COPPER METAL, CUPROUS OXIDE AND CUPRIC OXIDE AND RECOVERING THE UNSATURATED ALDEHYDE FROM THE RECTION MIXTURE.
Claim 2
Dependent Claim
86 words
PROCESS FOR THE MANUFACTURE OF AN UNSATURATED ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF ACROLEIN AND ALPHA-METHACROLEIN BY THE CATALYTIC OXIDATION OF THE CORRESPONDING OLEFINES PROPYLENE AND ISOBUTENE RESPECTIVELY WHICH COMPRISES PASSING THE OLEFINE WITH MOLECULAR OXYGEN CONTAINING GASES AT TEMPERATURES BETWEEN 200* AND 400*C. IN THE PRESENCE OF ELEMENTARY SELENIUM IN THE REACTION ZONE OVER A CONTACT MATERIAL CONTAINING AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF COPPER METAL, CUPROUS OXIDE AND CUPRIC OXIDE AND RECOVERING THE UNSATURATED ALDEHYDE FROM THE RECTION MIXTURE.
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) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |