Patent US2870866A successfully refreshed from Google Patents.
US2870866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of obtaining acetaldehyde
Assignee: Chematur AB
•
Filing: 1952-06-14
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Granted: 1959-01-27
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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 05:31
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
Cited
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 |