US3646079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of rhodium complexes
Assignee: BP PLC
•
Filing: 1969-02-07
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Granted: 1972-02-29
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Expires: 1989-02-07
Abstract
Abstract RHODIUM COMPLEXES ARE MADE BY REACTING A RHODIUM CARBONYL CARBOXYLATE WITH A REAGENT (OTHER THAN A HYDROGEN HALIDE) CONTAINING AN ACTIVE HYDROGEN ATOM. ACETYL ACETONATES AND SIMILAR COMPOUNDS ARE PREFERRED.
Inventors
- 👤 Malcolm J Lawrenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:54
CPC Classifications
C; C07; C07F; C07F15/00; C07F15/0006; C07F15/0073; C07F15/008; B; B01; B01J; B01J31/00; B01J31/16; B01J31/18; B01J31/1805; B01J31/22; B01J31/2204; B01J31/2208; B01J31/2226; B01J31/223; B01J31/2234; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/822; B01J2540/00; B01J2540/20; B01J2540/22
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |