US2670381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of olefines
Assignee: Distillers Co Yeast Ltd
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Filing: 1951-11-08
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Granted: 1954-02-23
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Expires: 1971-11-08
Abstract
No abstract record available.
Inventors
- 👤 Hadley David James
- 👤 Heap Robert
- 👤 Nichol Robert James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:06
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
63 words
PROCESS FOR THE MANUFACTURE OF AN UNSATURATED ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF ACROLEIN AND METHACROLEIN BY THE CATALYTIC OXIDATION OF OLEFINES SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND ISOBUTENE WITH GASES CONTAINING MOLECULAR OXYGEN AT TEMPERATURES BETWEEN 210* AND 400* C. WHICH COMPRISES PASSING THE REACTING GASES IN THE PRESENCE OF ELEMENTARY SELENIUM OVER A CONTACT MATERIAL COMPRISING COPPER ALUMINATE.
Claim 2
Dependent Claim
63 words
PROCESS FOR THE MANUFACTURE OF AN UNSATURATED ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF ACROLEIN AND METHACROLEIN BY THE CATALYTIC OXIDATION OF OLEFINES SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND ISOBUTENE WITH GASES CONTAINING MOLECULAR OXYGEN AT TEMPERATURES BETWEEN 210* AND 400* C. WHICH COMPRISES PASSING THE REACTING GASES IN THE PRESENCE OF ELEMENTARY SELENIUM OVER A CONTACT MATERIAL COMPRISING COPPER ALUMINATE.
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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |