Patent US2681371A successfully refreshed from Google Patents.
US2681371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of ortho substituted phenols, particularly ortho substituted hydroquinones
Assignee: Universal Oil Products Co
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Filing: 1950-12-14
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Granted: 1954-06-15
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Expires: 1970-12-14
Abstract
No abstract record available.
Inventors
- 👤 Gaydasch Alexander
- 👤 William K T Gleim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:15
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR PRODUCING AN ORTHO SUBSTITUTED PHENOL WHICH COMPRISES REACTING A PHENOL HAVING A REPLACEABLE NUCLEAR HYDROGEN ATOM IN ORTHO POSITION TO HYDROXYL WITH A HALIDE SELECTED FROM THE GROUP CONSISTING OF A TERTIARY ALKYL HALIDE, AN ALLYLIC HALIDE AND A BENZYL HALIDE IN THE PRESENCE OF A CAUSTIC SOLUTION AND AN ALKALINE REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METAL, ALKALINE EARTH METAL AND AMMONIUM HYDROSULFITES, SULFIDES, BISULFIDES, THIOSULFATES AND THIONATES.
Claim 2
Dependent Claim
76 words
A PROCESS FOR PRODUCING AN ORTHO SUBSTITUTED PHENOL WHICH COMPRISES REACTING A PHENOL HAVING A REPLACEABLE NUCLEAR HYDROGEN ATOM IN ORTHO POSITION TO HYDROXYL WITH A HALIDE SELECTED FROM THE GROUP CONSISTING OF A TERTIARY ALKYL HALIDE, AN ALLYLIC HALIDE AND A BENZYL HALIDE IN THE PRESENCE OF A CAUSTIC SOLUTION AND AN ALKALINE REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METAL, ALKALINE EARTH METAL AND AMMONIUM HYDROSULFITES, SULFIDES, BISULFIDES, THIOSULFATES AND THIONATES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-14 | 1957-12-14 | 1958-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-14 | 1961-12-14 | 1962-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-14 | 1965-12-14 | 1966-06-15 | $7700.00 | Window Closed / Lapsed |