Patent US3089829A successfully refreshed from Google Patents.
US3089829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of m-xylene and p-xylene by distillation in the presence of benzyl alcohol
Assignee: Pure Oil Co
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Filing: 1959-10-30
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Granted: 1963-05-14
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Expires: 1979-10-30
Abstract
No abstract record available.
Inventors
- 👤 Allen F Millikan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:09
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/005; C07C7/04; C07C7/05; C07C7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
THE PROCESS OF SEPARATING P-XYLENE AND M-XYLENE WHICH COMPRISES SUBJECTING A MIXTURE CONSISTING ESSENTIALLY OF SAME TO DISTILLATION IN THE PRESENCE OF BENZYL ALCOHOL AND RECOVERING AND OVERHEAD CONTAINING A MAJOR PORTION OF P-XYLENE AND A RESIDUE OF BENZYL ALCOHOL CONTAINING A MAJOR PORTION OF M-XYLENE.
Claim 2
Dependent Claim
46 words
THE PROCESS OF SEPARATING P-XYLENE AND M-XYLENE WHICH COMPRISES SUBJECTING A MIXTURE CONSISTING ESSENTIALLY OF SAME TO DISTILLATION IN THE PRESENCE OF BENZYL ALCOHOL AND RECOVERING AND OVERHEAD CONTAINING A MAJOR PORTION OF P-XYLENE AND A RESIDUE OF BENZYL ALCOHOL CONTAINING A MAJOR PORTION OF M-XYLENE.
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) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |