US3634539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin disproportionation
Assignee: Shell USA Inc
•
Filing: 1969-06-02
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Granted: 1972-01-11
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Expires: 1989-06-02
Abstract
Abstract OLEFINS ARE DISPROPORTIONATED WITH A CATALYST COMPOSITION PRODUCED BY CONTACTING A MOLYBDENUM OR TUNGSTEN HALIDE AND AN INORGANIC OXIDE SOLID.
Inventors
- 👤 Henk J Alkema
- 👤 Freddy Wattimena
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:39
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/02; C07C6/04; B; B01; B01J; B01J27/00; B01J27/02; B01J27/053; B01J27/06; B01J27/14; B01J27/186; C07C2523/00; C07C2523/02; C07C2523/04; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/06; C07C2527/08; C07C2527/132; C07C2527/14; C07C2527/16; C07C2527/167; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/94
Claims Analysis
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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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |