US2514960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dealkylation of alkylphenols
Assignee: Shell Development Co
•
Filing: 1947-03-08
•
Granted: 1950-07-11
•
Expires: 1967-03-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Daniel B Luten
- 👤 George M Good
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:14
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE PROCESS FOR THE PRODUCTION OF ALKYL-SUBSTITUTED PHENOLS HAVING NO MORE THAN THREE CARBON ATOMS IN A SINGLE ALKYL SUBSTITUENT FROM POLYALKYL SUBSTITUTED PHENOLS HAVING AN ALKYL SUBSTITUENT CONTAINING AT LEAST FOUR CARBON ATOMS AND AN ALKYL SUBSTITUENT CONTAINING LESS THAN FOUR CARBON ATOMS, WHICH COMPRISES CONTACTING SAID POLY-ALKYL SUBSTITUTED PHENOLS, IN THE VAPOR PHASE, AT A TEMPERATURE OF FROM ABOUT 250 TO ABOUT 450* C., WITH A SYNTHETIC CATALYST FORMED BY PRECIPITATION OF THE OXIDES CONSISTING ESSENTIALLY OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF ALUMINA AND SILICA, THEREBY SELECTIVELY REMOVING FROM SAID POLY-ALKYL SUBSTITUTED PHENOLS ALKYL SUBSTITUENTS CONTAINING AT LEAST FOUR CARBON ATOMS.
Claim 2
Dependent Claim
107 words
THE PROCESS FOR THE PRODUCTION OF ALKYL-SUBSTITUTED PHENOLS HAVING NO MORE THAN THREE CARBON ATOMS IN A SINGLE ALKYL SUBSTITUENT FROM POLYALKYL SUBSTITUTED PHENOLS HAVING AN ALKYL SUBSTITUENT CONTAINING AT LEAST FOUR CARBON ATOMS AND AN ALKYL SUBSTITUENT CONTAINING LESS THAN FOUR CARBON ATOMS, WHICH COMPRISES CONTACTING SAID POLY-ALKYL SUBSTITUTED PHENOLS, IN THE VAPOR PHASE, AT A TEMPERATURE OF FROM ABOUT 250 TO ABOUT 450* C., WITH A SYNTHETIC CATALYST FORMED BY PRECIPITATION OF THE OXIDES CONSISTING ESSENTIALLY OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF ALUMINA AND SILICA, THEREBY SELECTIVELY REMOVING FROM SAID POLY-ALKYL SUBSTITUTED PHENOLS ALKYL SUBSTITUENTS CONTAINING AT LEAST FOUR CARBON ATOMS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-10 | 1954-01-09 | 1954-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-10 | 1958-01-09 | 1958-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-10 | 1962-01-09 | 1962-07-11 | $7700.00 | Window Closed / Lapsed |