US2684389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of phenols
Assignee: Gulf Research and Development Co
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Filing: 1950-11-03
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Granted: 1954-07-20
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Expires: 1970-11-03
Abstract
No abstract record available.
Inventors
- 👤 William C Offutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:38
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PROCESS OF ALKYLATING A PHENOL SELECTED FROM THE GROUP CONSISTING OF PHENOL ITSELF AND MONO-ALKYL PHENOLS WITH A MONO-OLEFIN TO OBTAIN A GREATER YIELD OF A PRODUCT DIALKYLATED BY SAID OLEFIN WHICH COMPRISES FLOWING SAID PHENOL IN LIQUID PHASE DOWNWARDLY IN CONTACT WITH A SILICA-ALUMINA ADSORBENT CATALYST WHILE FLOWING VAPORS OF SAID MONO-OLEFIN IN AN AMOUNT SO AS TO PROVIDE ABOUT TWO TO ABOUT FOUR MOLS OF SAID OLEFIN PER MOL OF SAID PHENOL UPWARDLY IN CONTACT WITH SAID PHENOL AND SAID CATALYST AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 250* TO ABOUT 350* F. AND A PRESSURE OF ABOUT 250 TO ABOUT 350 POUNDS PER SQUARE INCH.
Claim 2
Dependent Claim
110 words
A PROCESS OF ALKYLATING A PHENOL SELECTED FROM THE GROUP CONSISTING OF PHENOL ITSELF AND MONO-ALKYL PHENOLS WITH A MONO-OLEFIN TO OBTAIN A GREATER YIELD OF A PRODUCT DIALKYLATED BY SAID OLEFIN WHICH COMPRISES FLOWING SAID PHENOL IN LIQUID PHASE DOWNWARDLY IN CONTACT WITH A SILICA-ALUMINA ADSORBENT CATALYST WHILE FLOWING VAPORS OF SAID MONO-OLEFIN IN AN AMOUNT SO AS TO PROVIDE ABOUT TWO TO ABOUT FOUR MOLS OF SAID OLEFIN PER MOL OF SAID PHENOL UPWARDLY IN CONTACT WITH SAID PHENOL AND SAID CATALYST AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 250* TO ABOUT 350* F. AND A PRESSURE OF ABOUT 250 TO ABOUT 350 POUNDS PER SQUARE INCH.
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) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |