Patent US3336408A successfully refreshed from Google Patents.
US3336408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alkenyl benzenes
Assignee: Distillers Co Yeast Ltd
•
Filing: 1964-08-05
•
Granted: 1967-08-15
•
Expires: 1984-08-05
Abstract
No abstract record available.
Inventors
- 👤 Capp Clifford William
- 👤 Gasson Edward James
- 👤 Grindlay Patricia Eileen
- 👤 Wood Barrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:32
CPC Classifications
B; B01; B01J; B01J21/00; B01J23/00; B01J23/16; B01J23/18; B01J23/70; B01J23/76; B01J23/84; B01J23/843; B01J23/8435; C; C07; C07C; C07C5/00; C07C5/42; C07C5/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PROCESS FOR THE PRODUCTION OF AN ALKENYL BENZENE WHICH COMPRISES REACTING AN ALKYL BENZENE IN WHICH THE ALKYL SIDE SHAINS CONTAIN SEPARATELY AT LEAST TWO CARBON ATOMS AT AN ELEVATED TEMPERATURE IN THE VAPOUR PHASE, WITH A GAS CONSISTING ESSENTIALLY OF MOLECULAR OXYGEN OR MOLECULAR OXYGEN IN COMBINATION WITH AN INERT DILUENT OVER AN OXIDATION CATALYST SELECTED FROM THE GROUP CONSISTING OF (I) ANTIMONY OXIDE ALONE AND (II) IN COMBINATION WITH AN OXIDE OF A POLYVALENT METAL HAVING AN ATOMIC NUMBER SELECTED FROM THE RANGE 22 TO 50, 57 TO 83, 90 AND 92 WHILST MAINTAINING THE CONDITIONS OF REACTION SUCH THAT OXIDATION OF THE STARTING MATERIAL TO ACIDIC REACTION PRODUCTS IS SUBSTANTIALLY AVOIDED.
Claim 2
Dependent Claim
115 words
A PROCESS FOR THE PRODUCTION OF AN ALKENYL BENZENE WHICH COMPRISES REACTING AN ALKYL BENZENE IN WHICH THE ALKYL SIDE SHAINS CONTAIN SEPARATELY AT LEAST TWO CARBON ATOMS AT AN ELEVATED TEMPERATURE IN THE VAPOUR PHASE, WITH A GAS CONSISTING ESSENTIALLY OF MOLECULAR OXYGEN OR MOLECULAR OXYGEN IN COMBINATION WITH AN INERT DILUENT OVER AN OXIDATION CATALYST SELECTED FROM THE GROUP CONSISTING OF (I) ANTIMONY OXIDE ALONE AND (II) IN COMBINATION WITH AN OXIDE OF A POLYVALENT METAL HAVING AN ATOMIC NUMBER SELECTED FROM THE RANGE 22 TO 50, 57 TO 83, 90 AND 92 WHILST MAINTAINING THE CONDITIONS OF REACTION SUCH THAT OXIDATION OF THE STARTING MATERIAL TO ACIDIC REACTION PRODUCTS IS SUBSTANTIALLY AVOIDED.
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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |