US3759838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rhodium halide complex catalyst compositions
Assignee: Shell USA Inc
•
Filing: 1971-06-11
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Granted: 1973-09-18
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Expires: 1991-06-11
Abstract
Abstract AN IMPROVED HOMOGENEOUS HYDROGENATION CATALYST COMPOSTION COMPRISES RHODIUM HALIDE COMPLEXES INCORPORATING STABILIZING OR ARSINE LIGANDS, AND EXCESS LIGAND.
Inventors
- 👤 K Dewhirst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:03
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/24; B01J31/2404; C; C07; C07C; C07C255/00; B01J2231/00; B01J2231/60; B01J2231/64; B01J2231/641; B01J2231/645; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/822; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |