US2735877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of aromatic compounds
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
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Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:28
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/44; C10G45/46; C07; C07C; C07C5/00; C07C5/02; C07C5/10; C07C2521/00; C07C2521/06; C07C2521/08; C07C2521/12; C07C2521/14; C07C2527/00; C07C2527/02; C07C2527/04; C07C2527/047; C07C2527/051
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
PROCESS FOR THE HYDROGENATION OF AROMATIC HYDROCARBONS WHICH COMPRISES CONTACTING AROMATIC HYDROCARBONS AT A TEMPERATURE OF FROM 250* C. TO 350* C. AND A PRESSURE OF FROM 500 TO 1800 P. S. I. WITH A CATALYST CONSISTING ESSENTIALLY OF A SPENT CRACKING CATALYST CONTAINING DEPOSITED THEREON FROM 10% TO 25% BY WEIGHT MOLYBDENUM DISULFIDE, SAID SPENT CRACKING CATALYST COMPRISING A CRACKING CATALYST PREVIOUSLY UTILIZED AS THE CATALYST IN A PROCESS FOR CRACKING HYDROCARBONS UNTIL ITS CRACKING ACTIVITY WAS SPENT TO AN EXTENT OF AT LEAST 30% OF ITS INITIAL CRACKING ACTIVITY.
Claim 2
Dependent Claim
91 words
PROCESS FOR THE HYDROGENATION OF AROMATIC HYDROCARBONS WHICH COMPRISES CONTACTING AROMATIC HYDROCARBONS AT A TEMPERATURE OF FROM 250* C. TO 350* C. AND A PRESSURE OF FROM 500 TO 1800 P. S. I. WITH A CATALYST CONSISTING ESSENTIALLY OF A SPENT CRACKING CATALYST CONTAINING DEPOSITED THEREON FROM 10% TO 25% BY WEIGHT MOLYBDENUM DISULFIDE, SAID SPENT CRACKING CATALYST COMPRISING A CRACKING CATALYST PREVIOUSLY UTILIZED AS THE CATALYST IN A PROCESS FOR CRACKING HYDROCARBONS UNTIL ITS CRACKING ACTIVITY WAS SPENT TO AN EXTENT OF AT LEAST 30% OF ITS INITIAL CRACKING ACTIVITY.
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) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |