Patent US3639490A successfully refreshed from Google Patents.
US3639490A
Expired / Lapsed
US
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Heptyl phenol alkylation
Assignee: Total Petrochemicals and Refining USA Inc
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Filing: 1966-02-25
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Granted: 1972-02-01
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Expires: 1986-02-25
Abstract
Abstract A C7 HEART CUT OF CATALYTIC GASOLINE CONTAINING LARGE QUANITIES OF OLEFINES AND CYCLOOLEFINES IS CONVERTED TO A SUBSTANTIALLY SATURATED DEHYDROAROMATIZATION FEEDSTOCK COMPOSED PREDOMINANTLY OF C7 PARAFFINS AND CYCLOALKANES WHILE SIMULTANEOUSLY PRODUCING HIGHLY ECONOMICALLY A MIXTURE OF ALKYL PHENOLS BY USING UP TO OLEFINE AND CYCLOOLEFINE CONTENT FO THE USATURATED C7 HEART CUT IN AN ALKYLATION REACTION UPON PHENOLS.
Inventors
- 👤 Rene P Brown
- 👤 Birt Allison Jr
- 👤 Paul D Meek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:39
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14
Claims Analysis
Total Claims: 0
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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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |