US3647908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin disproportionation
Assignee: Shell USA Inc
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Filing: 1969-12-15
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Granted: 1972-03-07
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Expires: 1989-12-15
Abstract
Abstract OLEFINS ARE DISPROPORTIONATED WITH A CATALYST PRODUCED BY CONTACTING (A) A MOLYBDENUM OR TUNGSTEN SALT (B) AN ALKYL ALUMINUM HALIDE AND (C) OXYGEN, AN ALKANOIC ACID OR A MIXTURE THEREOF.
Inventors
- 👤 Dirk Medema
- 👤 Willy Brunmayer-Schilt
- 👤 Robert Van Helden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:53
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/04; B01J31/12; B01J31/14; B01J31/143; B01J31/26; B01J31/34; C; C07; C07C; C07C6/00; C07C6/02; C07C6/04; C08; C08G; C08G67/00; B01J2231/00; B01J2231/50; B01J2231/54; B01J2231/543; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/94
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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |