Patent US3073866A successfully refreshed from Google Patents.
US3073866A
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Process of preparing hydroxy-alkoxy arylophenones
Assignee: GAF Chemicals Corp
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Filing: 1959-09-16
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Granted: 1963-01-15
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Expires: 1979-09-16
Abstract
No abstract record available.
Inventors
- 👤 Lester N Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:20
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/76; C07C49/84; C07C45/00; C07C45/45; C07C45/46; C07C49/82; C07C49/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE PROCESS OF PREPARING HYDROXY-ALKOXY ARYLOPHENONES WHICH COMPRISES CONDENSING A HYDROXY ARYL CARBOXYLIC ACID WITH AN ALKYL ETHER OF PHENOL IN THE PRESENCE OF A MIXTURE OF PHOSPHORUS TRICHOLORIDE AND ZINC CHLORIDE AS A CATALYST AND IN THE PRESENCE OF PHOSPHORIC ACID WHICH HAS A PHOSPHORIC ACID CONTENT OF 95-106% AS A SOLVENT, AND AT A TEMPERATURE RANGING FROM 45-75* C., AND ISOLATING AND PURIFYING THE SAID HYDROXY-ALKOXY ARYLOPHENONE.
Claim 2
Dependent Claim
69 words
THE PROCESS OF PREPARING HYDROXY-ALKOXY ARYLOPHENONES WHICH COMPRISES CONDENSING A HYDROXY ARYL CARBOXYLIC ACID WITH AN ALKYL ETHER OF PHENOL IN THE PRESENCE OF A MIXTURE OF PHOSPHORUS TRICHOLORIDE AND ZINC CHLORIDE AS A CATALYST AND IN THE PRESENCE OF PHOSPHORIC ACID WHICH HAS A PHOSPHORIC ACID CONTENT OF 95-106% AS A SOLVENT, AND AT A TEMPERATURE RANGING FROM 45-75* C., AND ISOLATING AND PURIFYING THE SAID HYDROXY-ALKOXY ARYLOPHENONE.
References Cited (Backward Citations)
US2921862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |