US2861104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing 2-hydroxy-4-alkoxybenzophenones
Assignee: GAF Chemicals Corp
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Filing: 1956-06-22
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Granted: 1958-11-18
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Expires: 1976-06-22
Abstract
No abstract record available.
Inventors
- 👤 Glahn William H Von
- 👤 Lester N Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:46
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/76; C07C49/84; B; B01; B01J; B01J27/00; B01J27/06; C07C45/00; C07C45/45; C07C45/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
THE PROCESS OF PREPARING 2-HYDROXY-4-ALKOXYBENZOPHENONES WHICH COMPRISES FIRST CONDENSING 100-180 PARTS BY WEIGHT OF A 1,3-DIALKOXYBENZENE WITH BENZOYL CHLORIDE AT A TEMPERATURE RANGING BETWEEN 0* AND 10*C. IN THE PRESENCE OF AN INERT SOLVENT-DILUENT AND IN THE PREENCE OF A REAGENT MIXTURE CONSISTING OF 10-30% BY WEIGHT OF ZINC CHLORIDE AND 70-90% BY WEIGHT OF ALUMINUM CHLORIDE, SAID REAGENT MIXTURE BEING EMPLOYED IN THE RANGE OF 95-125 PARTS BY WEIGHT PER 100-180 PARTS BY WEIGHT OF SAID 1,3-DIALKOXYBENZENE, THEN RAISING AND HOLDING THE TEMPERATURE BETWEEN 45*-75* C. TO DEALKYLATE THE CONDENSATION PRODUCT AND ISOLATING A 2-HYDROXY-4-ALKOXYBENZOPHENONE.
Claim 2
Dependent Claim
96 words
THE PROCESS OF PREPARING 2-HYDROXY-4-ALKOXYBENZOPHENONES WHICH COMPRISES FIRST CONDENSING 100-180 PARTS BY WEIGHT OF A 1,3-DIALKOXYBENZENE WITH BENZOYL CHLORIDE AT A TEMPERATURE RANGING BETWEEN 0* AND 10*C. IN THE PRESENCE OF AN INERT SOLVENT-DILUENT AND IN THE PREENCE OF A REAGENT MIXTURE CONSISTING OF 10-30% BY WEIGHT OF ZINC CHLORIDE AND 70-90% BY WEIGHT OF ALUMINUM CHLORIDE, SAID REAGENT MIXTURE BEING EMPLOYED IN THE RANGE OF 95-125 PARTS BY WEIGHT PER 100-180 PARTS BY WEIGHT OF SAID 1,3-DIALKOXYBENZENE, THEN RAISING AND HOLDING THE TEMPERATURE BETWEEN 45*-75* C. TO DEALKYLATE THE CONDENSATION PRODUCT AND ISOLATING A 2-HYDROXY-4-ALKOXYBENZOPHENONE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |