US2587489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of ketones
Assignee: Monsanto Chemicals Ltd
•
Filing: 1950-12-14
•
Granted: 1952-02-26
•
Expires: 1970-12-14
Abstract
No abstract record available.
Inventors
- 👤 Gennady M Kosolapoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:25
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/45; C07C45/46; C07C49/00; C07C49/76; C07C49/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A PROCESS FOR THE ACYLATION OF ALKOXY SUBSTITUTED AROMATIC COMPOUNDS, WHEREBY A NUCLEAR HYDROGEN ATOM OF THE SAID AROMATIC COMPOUND IS REPLACED WITH AN ACYL GROUP, WHICH COMPRISES REACTING SAID ALKOXY SUBSTITUTED AROMATIC COMPOUNDS WITH A CARBOXYLIC ACID IN THE PRESENCE OF PHOSPHORUS PENTOXIDE.
Claim 2
Dependent Claim
44 words
A PROCESS FOR THE ACYLATION OF ALKOXY SUBSTITUTED AROMATIC COMPOUNDS, WHEREBY A NUCLEAR HYDROGEN ATOM OF THE SAID AROMATIC COMPOUND IS REPLACED WITH AN ACYL GROUP, WHICH COMPRISES REACTING SAID ALKOXY SUBSTITUTED AROMATIC COMPOUNDS WITH A CARBOXYLIC ACID IN THE PRESENCE OF PHOSPHORUS PENTOXIDE.
References Cited (Backward Citations)
GB316750A
Cited
US2238594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |