US3395178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing unsaturated carboxylic acids with phosphomolybdic acid on silicon carbide as catalyst
Assignee: Standard Oil Co
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Filing: 1965-03-08
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Granted: 1968-07-30
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Expires: 1985-03-08
Abstract
No abstract record available.
Inventors
- 👤 James L Callahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:24
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/186; B01J27/188; B01J27/19; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
IN A METHOD OF MANUFACTURING UNSATURATED CARBOXYLIC ACIDS BY REACTING A CORRESPONDING UNSATURATED ALDEHYDE WITH OXYGEN AT ABOUT 875*F. WITH A CONTACT TIME OF ABOUT 10 SECONDS, IN THE PRESENCE OF A CATALYST COMPOSITION CONSISTING OF PHOSPHOMOLYBDIC ACID ON A SUPPORT OR CARRIER, THE IMPROVEMENT CONSISTING OF USING AS THE CATALYST COMPOSITION SILICON CARBIDE WHICH HAS BEEN IMPREGNATED WITH SAID PHOSPHOMOLYBDIC ACID IN THE RANGE OF ABOUT 1 TO 35 PERCENT BY WEIGHT OF SAID CATALYST COMPOSITION.
Claim 2
Dependent Claim
77 words
IN A METHOD OF MANUFACTURING UNSATURATED CARBOXYLIC ACIDS BY REACTING A CORRESPONDING UNSATURATED ALDEHYDE WITH OXYGEN AT ABOUT 875*F. WITH A CONTACT TIME OF ABOUT 10 SECONDS, IN THE PRESENCE OF A CATALYST COMPOSITION CONSISTING OF PHOSPHOMOLYBDIC ACID ON A SUPPORT OR CARRIER, THE IMPROVEMENT CONSISTING OF USING AS THE CATALYST COMPOSITION SILICON CARBIDE WHICH HAS BEEN IMPREGNATED WITH SAID PHOSPHOMOLYBDIC ACID IN THE RANGE OF ABOUT 1 TO 35 PERCENT BY WEIGHT OF SAID CATALYST COMPOSITION.
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) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |