US3105017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extractive distillation of ethylbenzene
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1960-06-22
•
Granted: 1963-09-24
•
Expires: 1980-06-22
Abstract
No abstract record available.
Inventors
- 👤 Emanuel M Amir
- 👤 William R Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:30
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A METHOD FOR SEPARATING A C8 AROMATIC HYDROCARBON MIXTURE CONSISTING ESSENTIALLY OF ETHYLBENZENE AND AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF ORTHOXYLENE, METAXYLENE, AND PARAXYLENE WHICH COMPRISES DISTILLING SAID MIXTURE IN THE PRESENCE OF A COMPOUND CONTAINING A SINGLE BENZENE RING SUBSTITUTED ON THE RING IN AT LEAST TWO POSITIONS WITH A CHLORO GROUP UNDER CONDITIONS TO SEPARATE A FRACTION ENRICHED IN ETHYLBENZENE.
Claim 2
Independent Claim
66 words
A METHOD FOR SEPARATING A C8 AROMATIC HYDROCARBON MIXTURE CONSISTING ESSENTIALLY OF ETHYLBENZENE AND AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF ORTHOXYLENE, METAXYLENE, AND PARAXYLENE WHICH COMPRISES DISTILLING SAID MIXTURE IN THE PRESENCE OF A COMPOUND CONTAINING A SINGLE BENZENE RING SUBSTITUTED ON THE RING IN AT LEAST TWO POSITIONS WITH A CHLORO GROUP UNDER CONDITIONS TO SEPARATE A FRACTION ENRICHED IN ETHYLBENZENE.
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) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |