US3325516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of hydrocarbons
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1965-11-08
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Granted: 1967-06-13
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Expires: 1985-11-08
Abstract
No abstract record available.
Inventors
- 👤 Fettis Gordon Cheyne
- 👤 Thomas Peter James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:19
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/002; B01J23/16; B01J23/24; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J27/00; B01J27/02; B01J27/057; B01J27/0576; B01J27/14; B01J27/186; B01J27/195; B01J27/198; B01J27/199; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B01J2523/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A PROCESS FOR MANUFACTURE OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID, MALEIC ANHYDRIDE AND ACRYLIC ACID WHICH COMPRISES INTERACTING N-BUTENE WITH OXYGEN IN THE VAPOUR PHASE AT A TEMPERATURE IN THE RANGE FROM 250* TO 550*C. IN THE PRESENCE OF A CATALYST COMPRISING AN OXIDE OF TELLURIUM IN ADMIXTURE OR CHEMICAL COMBINATION WITH AN OXIDE OF MOLYBDENUM, SAID CATALYST ALSO COMPRISING PHOSPHORUS.
Claim 2
Dependent Claim
66 words
A PROCESS FOR MANUFACTURE OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID, MALEIC ANHYDRIDE AND ACRYLIC ACID WHICH COMPRISES INTERACTING N-BUTENE WITH OXYGEN IN THE VAPOUR PHASE AT A TEMPERATURE IN THE RANGE FROM 250* TO 550*C. IN THE PRESENCE OF A CATALYST COMPRISING AN OXIDE OF TELLURIUM IN ADMIXTURE OR CHEMICAL COMBINATION WITH AN OXIDE OF MOLYBDENUM, SAID CATALYST ALSO COMPRISING PHOSPHORUS.
References Cited (Backward Citations)
US3156706A
Cited
US3228890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |