US3029276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of 3, 5-disubstituted-4-hydroxy benzoic acids and their esters
Assignee: Bayer AG
•
Filing: 1959-06-05
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Granted: 1962-04-10
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Expires: 1979-06-05
Abstract
No abstract record available.
Inventors
- 👤 Hausweiler Arnold
- 👤 Seydel Robert
- 👤 Stroh Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:14
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/093; C07C51/15; Y; Y10; Y10T; Y10T292/00; Y10T292/48
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
112 words
A PROCESS COMPRISING REACTING AT A TEMPERATURE BETWEEN ABOUT ROOM TEMPERATURE AND 100*C. SUBSTANTIALLY EQUI-MOLECULAR AMOUNTS OF CARBON TETRAACHLORIDE AND A PHENOL SUBSTITUTED IN EACH ORTHO-POSITION WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF METHYL, ETHYL, ISOPROPYL, TERTIARY BUTYL. SEC. BUTYL,ALLYL,CYCLOHEXYL, CYCLOPENTENYL AND PHENYL RADICALS IN AN ALCOHOL WATER SOLUTION OF ABOUT 50-90% CONCENTRATION CONTAINING ABOUT 4-6 MOLS OF AN ALKALI METAL HYDROXIDE PER MOLE OF CARBON TETRACHLORIDE AND A CATLYTIC AMOUNT OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF COPPER, COPPER SULPHATE, COPPER ACETATE, COPPER NITRAATE AND MIXTURES THEREOF TO THEREBY FROM A 4-HYDROXY BENZOIC ACID ESTER SUBSTITUTED IN THE 3,5 POSITIONS WITH MEMBERS OF SAID FIRST MEMTIONED GROUP.
Claim 2
Dependent Claim
112 words
A PROCESS COMPRISING REACTING AT A TEMPERATURE BETWEEN ABOUT ROOM TEMPERATURE AND 100*C. SUBSTANTIALLY EQUI-MOLECULAR AMOUNTS OF CARBON TETRAACHLORIDE AND A PHENOL SUBSTITUTED IN EACH ORTHO-POSITION WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF METHYL, ETHYL, ISOPROPYL, TERTIARY BUTYL. SEC. BUTYL,ALLYL,CYCLOHEXYL, CYCLOPENTENYL AND PHENYL RADICALS IN AN ALCOHOL WATER SOLUTION OF ABOUT 50-90% CONCENTRATION CONTAINING ABOUT 4-6 MOLS OF AN ALKALI METAL HYDROXIDE PER MOLE OF CARBON TETRACHLORIDE AND A CATLYTIC AMOUNT OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF COPPER, COPPER SULPHATE, COPPER ACETATE, COPPER NITRAATE AND MIXTURES THEREOF TO THEREBY FROM A 4-HYDROXY BENZOIC ACID ESTER SUBSTITUTED IN THE 3,5 POSITIONS WITH MEMBERS OF SAID FIRST MEMTIONED GROUP.
Claim 3
Dependent Claim
26 words
PROCESS ACCORDING TO CLAIM 1, WHICH INCLUDES SAPONIFYING THE 3,5 DISUBSTITUTED 4-HYDROXY BENZOIC ACID ESTER AND RECOVERING THE FREE 3,5-DISUBSTITUTED BENZOIC ACID FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
DE258887C
Cited
US2871256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |