US2818451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization of aromatic hydrocarbon
Assignee: Phillips Petroleum Co
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Filing: 1954-06-14
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Granted: 1957-12-31
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Expires: 1974-06-14
Abstract
No abstract record available.
Inventors
- 👤 John W Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:26
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2702; C07C5/2705
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PROCESS WHICH COMPRISES ISOMERIZING AT LEAST ONE POLYALKYLBENZENE CONTAINING A MAXIMUM OF 4 ALKYL GROUPS PER MOLECULE AND A MAXIMUM OF 2 CARBON ATOMS PER GROUP IN CONTACT WITH A CATALYST COMPRISING ESSENTIALLY MANGANESE OXIDE IN ADMIXTURE WITH AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF SILICA, ALUMINA, ZIRCONIA, MAGNESIA, BORIA, TITANIA, AND HF-TREATED ALUMINA UNDER ISOMERIZING CONDITIONS.
Claim 2
Dependent Claim
60 words
A PROCESS WHICH COMPRISES ISOMERIZING AT LEAST ONE POLYALKYLBENZENE CONTAINING A MAXIMUM OF 4 ALKYL GROUPS PER MOLECULE AND A MAXIMUM OF 2 CARBON ATOMS PER GROUP IN CONTACT WITH A CATALYST COMPRISING ESSENTIALLY MANGANESE OXIDE IN ADMIXTURE WITH AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF SILICA, ALUMINA, ZIRCONIA, MAGNESIA, BORIA, TITANIA, AND HF-TREATED ALUMINA UNDER ISOMERIZING CONDITIONS.
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) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |