US2789995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of phenol with acrylonitrile
Assignee: Union Carbide Corp
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Filing: 1954-04-29
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Granted: 1957-04-23
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Expires: 1974-04-29
Abstract
No abstract record available.
Inventors
- 👤 Hugh W Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:01
CPC Classifications
C; C07; C07C; C07C255/00; C07C45/00; C07C51/00; C07C51/08; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/06; C07D311/20; C07D311/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
METHOD FOR PREPARING ORTHO HYDROXY PHENYL PROPIONITRILE WHICH COMPRISES REACTING TOGETHER AT A REACTION TEMPERATURE NOT IN EXCESS OF ABOUT 50*C. SUBSTANTIALLY EQUIMOLAR PROPORTIONS OF PHENOL AND ACRYLONITRILE IN THE PRESENCE OF BETWEEN 0.1 AND ONE MOL OF ANHYDROUS ALUMINUM CHLORIDE PER MOL OF PHENOL AND SUFFICIENT ANHYDROUS HYDROGEN CHLORIDE TO PREVENT THE FORMATION OF PHENOL-ALUMINUM CHLORIDE COMPLEXES INSOLUBLE IN ACRYLONITRILE.
Claim 2
Dependent Claim
61 words
METHOD FOR PREPARING ORTHO HYDROXY PHENYL PROPIONITRILE WHICH COMPRISES REACTING TOGETHER AT A REACTION TEMPERATURE NOT IN EXCESS OF ABOUT 50*C. SUBSTANTIALLY EQUIMOLAR PROPORTIONS OF PHENOL AND ACRYLONITRILE IN THE PRESENCE OF BETWEEN 0.1 AND ONE MOL OF ANHYDROUS ALUMINUM CHLORIDE PER MOL OF PHENOL AND SUFFICIENT ANHYDROUS HYDROGEN CHLORIDE TO PREVENT THE FORMATION OF PHENOL-ALUMINUM CHLORIDE COMPLEXES INSOLUBLE IN ACRYLONITRILE.
References Cited (Backward Citations)
DE870273C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |