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Patent US3794648A successfully refreshed from Google Patents.
US3794648A
Expired / Lapsed
US
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Process for making catalytic noble metal complexes
Assignee: Olin Corp
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Filing: 1971-06-14
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Granted: 1974-02-26
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Expires: 1991-06-14
Abstract
Abstract AS IMPROVEMENT IS DISCLOSED IN THE REACTION OF A HETEROAROMATIC NITROGEN COMPOUND WITH A ALKALI MEAAL-HALOGENOUS NOBLE METAL DERIVATIVE TO FORM A COMPLED. THE IMPROVEMENT RESIDES IN CONTROLLING THE PH OF THE REACTION MIXTURE WITHIN THE RANGE OF ABOUT 2.0-5.0 IN ORDER TO MINIMIZE NOBLE METAL LOSSES AND MAXIMIZE COMPLEX YIELD. THE PRODUCT COMPLEX IS OF UTILITY IN CATALYZING THE REACTION OF CATBON MONOXIDE WITH AROMATIC NITRO COMPOUNDS TO FORM AAOMATIC ISOCYANATES.
Inventors
- 👤 W Litz
- 👤 P Hammond
- 👤 F Manemeit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:03
CPC Classifications
C; C07; C07F; C07F15/00; C07F15/0006; C07F15/0073; C07F15/008; B; B01; B01J; B01J31/00; B01J31/16; B01J31/18; B01J31/1805; B01J31/181; B01J31/1825; C07F15/0033; C07F15/004; C07F15/006; C07F15/0066; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/821; B01J2531/822; B01J2531/824; B01J2531/825; B01J2531/827; B01J2531/828; B01J2531/90; B01J2531/96
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |