US2785210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing aromatic hydrocarbons
Assignee: Hoechst AG
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Filing: 1954-08-24
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Granted: 1957-03-12
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Expires: 1974-08-24
Abstract
No abstract record available.
Inventors
- 👤 Schmetterling Arie
- 👤 Krekeler Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:11
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/373; C07C5/393; C07C5/41; C07C5/412
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A PROCESS FOR PREPARING AROMATIC HYDROCARBONS BY CONDUCTING 2,2,4-TRIMETHYLPENTENE VAPORS OVER SOLID CATALYSTS AT ELEVATED TEMPERATURES WHICH PROCESS COMPRISES CARRYING OUT THE REACTION IN THE PRESENCE OF A CATALYST COMPRISING 5 TO 40% OF CHROMIUM OXIDE, 1 TO 10% OF POTASSIUM OXIDE, 0.5 TO 5% OF CERIUM OXIDE AND 93.5 TO 45% OF Y-ALUMINUM OXIDE IN THE PRESENCE OF CARRIER GASES AT TEMPERATURES BETWEEN 450*C. AND 650* C. FOR A CONTACT TIME OF BETWEEN 0.1 AND 60 SECONDS.
Claim 2
Dependent Claim
78 words
A PROCESS FOR PREPARING AROMATIC HYDROCARBONS BY CONDUCTING 2,2,4-TRIMETHYLPENTENE VAPORS OVER SOLID CATALYSTS AT ELEVATED TEMPERATURES WHICH PROCESS COMPRISES CARRYING OUT THE REACTION IN THE PRESENCE OF A CATALYST COMPRISING 5 TO 40% OF CHROMIUM OXIDE, 1 TO 10% OF POTASSIUM OXIDE, 0.5 TO 5% OF CERIUM OXIDE AND 93.5 TO 45% OF Y-ALUMINUM OXIDE IN THE PRESENCE OF CARRIER GASES AT TEMPERATURES BETWEEN 450*C. AND 650* C. FOR A CONTACT TIME OF BETWEEN 0.1 AND 60 SECONDS.
References Cited (Backward Citations)
US2337190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |