US3725462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of substituted phenyl esters and optionally substituted phenols
Assignee: Hoechst AG
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Filing: 1968-09-19
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Granted: 1973-04-03
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Expires: 1988-09-19
Abstract
Abstract Manufacture of substituted phenyl esters and optionally substituted phenols by reaction of a substituted benzene with an aliphatic or cycloaliphatic carboxylic acid and oxygen in the presence of a noble metal of Group VIII of the Mendeleeff Periodic Table and/or a compound thereof.
Inventors
- 👤 M Boldt
- 👤 H Arpe
- 👤 L Hornig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:47
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/58; C07C67/00; C07C67/04; C07C67/05; C07C67/055; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
15 words
The process of claim 1, wherein the carboxylic acid has at most 4 carbon atoms.
Claim 2
Dependent Claim
26 words
The process of claim 1, wherein di-substituted benzene carrying substituents selected from the group consisting of halogen atoms and alkoxy groups is used as starting compound.
Claim 3
Dependent Claim
17 words
The process of claim 1, wherein the noble metal is palladium in a free or bound form.
Claim 4
Dependent Claim
26 words
The process of claim 1, wherein the process is carried out in the gaseous phase, the noble metal or its compound being supported on a carrier.
Claim 5
Dependent Claim
50 words
The process of claim 1, wherein an activator is additionally used, said activator being a salt of a strong base with a weak acid, a buffer system with a carboxylic acid which is used as a starting material as the acid and an alkali metal phosphate, or an acid salt.
References Cited (Backward Citations)
US3190912A
Cited
US3493605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |