Patent US3299155A successfully refreshed from Google Patents.
US3299155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidative dehydrogenation of alkyl benzenes with canipo4 and so2
Assignee: Shell USA Inc
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Filing: 1964-02-24
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Granted: 1967-01-17
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Expires: 1984-02-24
Abstract
No abstract record available.
Inventors
- 👤 Charles R Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:56
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/42; C07C5/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
THE PROCESS FOR THE PRODUCTION OF ALKYLENE SUBSTITUTED BENZENES SELECTED FROM THE GROUP CONSISTING OF BENZENE AND METHYL SUBSTITUTED BENZENES HAVING AT LEAST ONE ALKYLENE OF THE GROUP CONSISTING OF VINYL AND ISOPROPENYL DIRECTLY ATTACHED TO THE BENZENE NUCLES WHICH CONSISTS OF CONTACTING AN ALKYL-SUBSTITUTED BENZENE SELECTED FROM THE GROUP CONSISTING OF BENZENE AND METHYL-SUBSTITUTED BENZENES HAVING AT LEAST ONE ALKYL SELECTED FROM THE GROUP CONSISTING OF ETHYL AND ISOPROPYL DIRECTLY ATTACHED TO THE BENZENE NUCLEUS, IN ADMIXTURE WITH SULFUR DIOXIDE, IN VAPOR PHASE, AT A TEMPERATURE OF FROM ABOUT 300* TO ABOUT 700*C., WITH A METAL PHOSPHATE CATALYST.
Claim 2
Dependent Claim
99 words
THE PROCESS FOR THE PRODUCTION OF ALKYLENE SUBSTITUTED BENZENES SELECTED FROM THE GROUP CONSISTING OF BENZENE AND METHYL SUBSTITUTED BENZENES HAVING AT LEAST ONE ALKYLENE OF THE GROUP CONSISTING OF VINYL AND ISOPROPENYL DIRECTLY ATTACHED TO THE BENZENE NUCLES WHICH CONSISTS OF CONTACTING AN ALKYL-SUBSTITUTED BENZENE SELECTED FROM THE GROUP CONSISTING OF BENZENE AND METHYL-SUBSTITUTED BENZENES HAVING AT LEAST ONE ALKYL SELECTED FROM THE GROUP CONSISTING OF ETHYL AND ISOPROPYL DIRECTLY ATTACHED TO THE BENZENE NUCLEUS, IN ADMIXTURE WITH SULFUR DIOXIDE, IN VAPOR PHASE, AT A TEMPERATURE OF FROM ABOUT 300* TO ABOUT 700*C., WITH A METAL PHOSPHATE CATALYST.
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) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |