Patent US3574729A successfully refreshed from Google Patents.
US3574729A
Expired / Lapsed
US
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Production of unsaturated aliphatic acids
Assignee: Distillers Co Yeast Ltd
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Filing: 1966-10-25
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Granted: 1971-04-13
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Expires: 1986-10-25
Abstract
Abstract THE PRODUCTION OF ACRYLIC AND METHACRYLIC ACID BY REACTING ACROLEIN AND METHACROLEIN, RESPOECTIVELY, WITH OXYGEN AT ELEVATED TEMPERATURES IN THE PRESENCE OF A PRIMARY OXIDE COMPOSITION OF ANTIMONY, MOLYBDENUM AND VANADIUM WITH AN ADDITIONAL OXIDE OF AN ELEMENT OF THE GROUP CONSISTING OF TIN, NICKEL, CHROMIUM AND TITANIUM, SAID COMPOSITION LESS MOLYBDENUM, HAVING BEEN HEATED IN THE PRESENCE OF OXYGEN AT 700 TO 900* C. IN THE PRESENCE OF OXYGEN.
Inventors
- 👤 Edward James Gasson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:05
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8875; B01J23/16; B01J23/24; B01J23/28; B01J23/882; B01J23/883; B01J23/8876; B01J23/8877; B01J23/8878; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B01J2523/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |