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US2863923A
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Process for the preparation of 2, 5-dimethylcyclopentanone
Assignee: Rohm and Haas Co
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Filing: 1955-10-20
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Granted: 1958-12-09
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Expires: 1975-10-20
Abstract
No abstract record available.
Inventors
- 👤 Newman M Bortnick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:37
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/45
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A CONTINUOUS CATALYTIC METHOD FOR THE VAPOR PHASE PREPARATION OF 2,5-DIMETHYLCYCLOPENTANONE WHICH COMPRISES HEATING IN A REACTION ZONE A DIALKYL 2,5-DIMETHYLADIPATE, IN WHICH EACH OF THE ALKYL GROUPS HAS FROM ONE TO FOUR CARBON ATOMS, IN THE TEMPERATURE RANGE OF ABOUT 350* TO 600*C. IN THE PRESENCE OF A METTALIC OXIDE CATALYST, THE METAL PORTION OF WHICH HAS AN ATOMIC WEIGHT OF ABOUT 7 TO 137.
Claim 2
Dependent Claim
66 words
A CONTINUOUS CATALYTIC METHOD FOR THE VAPOR PHASE PREPARATION OF 2,5-DIMETHYLCYCLOPENTANONE WHICH COMPRISES HEATING IN A REACTION ZONE A DIALKYL 2,5-DIMETHYLADIPATE, IN WHICH EACH OF THE ALKYL GROUPS HAS FROM ONE TO FOUR CARBON ATOMS, IN THE TEMPERATURE RANGE OF ABOUT 350* TO 600*C. IN THE PRESENCE OF A METTALIC OXIDE CATALYST, THE METAL PORTION OF WHICH HAS AN ATOMIC WEIGHT OF ABOUT 7 TO 137.
References Cited (Backward Citations)
GB191319409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |