US2572941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing 2-methyl-1, 3-pentanediol
Assignee: Celanese Corp
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Filing: 1948-07-08
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Granted: 1951-10-30
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Expires: 1968-07-08
Abstract
No abstract record available.
Inventors
- 👤 Alexander F Maclean
- 👤 Stautzenberger Adin Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:50
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/132; C07C29/136; C07C29/14; C07C29/141; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
PROCESS FOR THE PRODUCTION OF 2-METHYL-1,3PENTANEDIOL, WHICH COMPRISES ALDOLING UNDER HYDROGEN PRESSURE AN ALKALINE SOLUTION OF PROPIONALDEHYDE IN PROPYL ALCOHOL CONTAINING A NICKEL HYDROGENATION CATALYST AT A TEMPERATURE OF 200 TO 300* F. FOR 1 TO 4 HOURS, WHEREBY PROPIONALDOL IS FORMED AND IS CONCURRENTLY CATALYTICALLY HYDROGENATED TO 2-METHYL-1,3-PENTANEDIOL AS FORMED.
Claim 2
Dependent Claim
51 words
PROCESS FOR THE PRODUCTION OF 2-METHYL-1,3PENTANEDIOL, WHICH COMPRISES ALDOLING UNDER HYDROGEN PRESSURE AN ALKALINE SOLUTION OF PROPIONALDEHYDE IN PROPYL ALCOHOL CONTAINING A NICKEL HYDROGENATION CATALYST AT A TEMPERATURE OF 200 TO 300* F. FOR 1 TO 4 HOURS, WHEREBY PROPIONALDOL IS FORMED AND IS CONCURRENTLY CATALYTICALLY HYDROGENATED TO 2-METHYL-1,3-PENTANEDIOL AS FORMED.
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) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |