US2809939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidized silica gel catalysts containing vanadium pentoxide and oxides of metals of group iii-b and iv-a
Assignee: Wyeth Holdings LLC
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Filing: 1954-11-18
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Granted: 1957-10-15
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Expires: 1974-11-18
Abstract
No abstract record available.
Inventors
- 👤 James K Dixon
- 👤 Samuel W Tribit
- 👤 Wesley O Fugate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:01
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/22; C; C07; C07B; C07B35/00; C07B35/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A METHOD OF PREPARING A CATALYST FOR THE FLUIDIZED CATALYST OXIDATION OF ORGANIC COMPOUNDS WHICH COMPRISES REACTING A POTASSIUM SILICATE WITH SULFURIC ACID AT A PH NOT IN EXCESS OF 8, PRECIPATING IN THE GEL A MAJOR AMOUNT OF VANADIUM PENTOXIDE AND A MINOR AMOUNT OF A PROMOTER CONSISTING OF AN OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ALUMIUM, ZIRCONIUM, AND THORIUM, DRYING THE ENTIRE PRECIPITATION MIXTURE WITHOUT WASHING OUT ANY SOLUBLE MATERIAL, CALCINING, AND GRINDING TO FLUIDIZED CATALYST FINENESS.
Claim 2
Independent Claim
83 words
A METHOD OF PREPARING A CATALYST FOR THE FLUIDIZED CATALYST OXIDATION OF ORGANIC COMPOUNDS WHICH COMPRISES REACTING A POTASSIUM SILICATE WITH SULFURIC ACID AT A PH NOT IN EXCESS OF 8, PRECIPATING IN THE GEL A MAJOR AMOUNT OF VANADIUM PENTOXIDE AND A MINOR AMOUNT OF A PROMOTER CONSISTING OF AN OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ALUMIUM, ZIRCONIUM, AND THORIUM, DRYING THE ENTIRE PRECIPITATION MIXTURE WITHOUT WASHING OUT ANY SOLUBLE MATERIAL, CALCINING, AND GRINDING TO FLUIDIZED CATALYST FINENESS.
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) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |