US2737534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of aromatic hydrocarbons from six carbon aliphatic diols
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1951-12-27
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Granted: 1956-03-06
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Expires: 1971-12-27
Abstract
No abstract record available.
Inventors
- 👤 Taylor Arthur William Charles
- 👤 Jones David Gwyn
- 👤 Noble Morag Lauchlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:14
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A PROCESS FOR THE PRODUCTION OF HYDROCARBON MIXTURE CONTAINING P-XYLENE WHICH COMPRISES THE STEP OF CONTACTING AT LEAST ONE DIHYDRIC ALCOHOL SELECTED FROM THE GROUP CONSISTING OF 2,5-DIMETHYLHEX-3 ENE-2,5-DIOL AND 2,5-DIMETHYLHEXANE-2,5-DIOL IN THE PRECENCE OF HYDROGEN AT A TEMPERATURE WITHIN THE RANGE OF 300* TO 750* C. IN THE VAPOR PHASE WITH A CATALYST CONSISTING ESSENTIALLY OF CHROMIC OXIDE AND ALUMINA.
Claim 2
Dependent Claim
61 words
A PROCESS FOR THE PRODUCTION OF HYDROCARBON MIXTURE CONTAINING P-XYLENE WHICH COMPRISES THE STEP OF CONTACTING AT LEAST ONE DIHYDRIC ALCOHOL SELECTED FROM THE GROUP CONSISTING OF 2,5-DIMETHYLHEX-3 ENE-2,5-DIOL AND 2,5-DIMETHYLHEXANE-2,5-DIOL IN THE PRECENCE OF HYDROGEN AT A TEMPERATURE WITHIN THE RANGE OF 300* TO 750* C. IN THE VAPOR PHASE WITH A CATALYST CONSISTING ESSENTIALLY OF CHROMIC OXIDE AND ALUMINA.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |