Patent US3776971A successfully refreshed from Google Patents.
US3776971A
Expired / Lapsed
US
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Process for preparing a monoalkyl aromatic
Assignee: Gulf Research and Development Co
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Filing: 1971-08-13
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Granted: 1973-12-04
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Expires: 1991-08-13
Abstract
Abstract AN IMPROVEMENT IN A PROCESS WHEREIN A FIRST COMPOUND IS CONVERTED TO A SECOND COMPOUND IN AN ESSENTIALLY IRREVERSIBLE REACTION OR TO THE SECOND COMPOUND AND TO A THIRD COMPOUND IN ESSENTIALY IRREVERSIBLE REACTIONS AND THE SECOND COMPOUND AND THE THIRD COMPOUND ARE CONVERTIBLE TO EACH OTHER IS EQUILIBRIUM-LIMITED REACTIONS WHICH INVOLVES INTRODUCING THE THIRD COMPOUND INTO THE REACTION ZONE IN AN AMOUNT GREATER THAN THE AMOUNT THAT WOULD BE PRESENT AT EQUILIBRIUM AND TERMINATING THE PROCESS BEFORE THE REACTION MIXTURE REACHES EQUILIBRIUM.
Inventors
- 👤 N Carr
- 👤 D Ko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:44
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/0006; C; C07; C07C; C07C15/00; C07C15/02; C07C15/085; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/901; Y10S585/949; Y10S585/954
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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |