US2870866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of obtaining acetaldehyde
Assignee: Chematur AB
•
Filing: 1952-06-14
•
Granted: 1959-01-27
•
Expires: 1972-06-14
Abstract
No abstract record available.
Inventors
- 👤 Baecklund Gunnar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:06
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/783
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
METHOD OF OBTAINING ACETALDEHYDE FROM ACETALDEHYDE CONTAINING GASES OBTAINED FROM ETHYL ALCOHOL BY CATALYSIS BY WASHING WITH AN ETHYL ALCOHOL-WATER MIXTURE OF SUCH A STRENGTH THAT THE ABSORBATE DOES NOT CONTAIN MORE WATER THAN FROM 60 TO 10 PERCENT BY WEIGHT.
Claim 2
Dependent Claim
41 words
METHOD OF OBTAINING ACETALDEHYDE FROM ACETALDEHYDE CONTAINING GASES OBTAINED FROM ETHYL ALCOHOL BY CATALYSIS BY WASHING WITH AN ETHYL ALCOHOL-WATER MIXTURE OF SUCH A STRENGTH THAT THE ABSORBATE DOES NOT CONTAIN MORE WATER THAN FROM 60 TO 10 PERCENT BY WEIGHT.
References Cited (Backward Citations)
US1426449A
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US1956440A
Cited
US2173111A
Cited
US2083877A
Cited
US2249847A
Cited
US2204652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |