US3829392A
Expired / Lapsed
US
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Heterogeneous catalysts for olefin epoxidation
Assignee: Shell USA Inc
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Filing: 1972-03-13
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Granted: 1974-08-13
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Expires: 1992-03-13
Abstract
Abstract SOLID CHEMICAL COMBINATION OF CERTAIN METAL OXIDES OR HYDDROXIDES WITH OXYGEN COMPOUNDS OF SILICON GIVE IMPROVED PERFOAMANCE AS A CATALYST FOR THE EPOXIDATION OF OLEFINICALLY UNSATURATED COMPOUNDS WITH ORGANIC HYDROPEROXIDES WHEN THE CATALYSTS ARE FIRST TREATED WITH AN ORGANIC SILYLATING AGENT AT ELEVATED TEMPERATURE.
Inventors
- 👤 H Wulff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:32
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/02; B01J37/0201; B01J37/0209; B01J21/00; B01J21/06; B01J21/063; B01J31/00; B01J31/02; B01J31/0234; B01J31/0235; B01J31/0254; B01J31/0272; B01J31/0274; B01J2231/00; B01J2231/70; B01J2231/72; B01J23/00; B01J23/16; B01J23/20; B01J23/22; B01J23/24; B01J23/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |