Patent US3828071A successfully refreshed from Google Patents.
US3828071A
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Catalytic oxidation of arylmethane compounds
Assignee: BASF SE
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Filing: 1972-07-28
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Granted: 1974-08-06
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Expires: 1992-07-28
Abstract
Abstract A PROCESS FOR THE CATALYTIC OXIDATION OF P-AMINO-SBSTITUTED DI-(HETERTO)-ARYLMETHANE AND TRI-(HETERO)-ARYLMETHANE COMPOUNDS WITH OXYGEN IN THE PRESENCE OF A QUINONE AND A CATALYST CONTAINING A HEAVY METAL IN COMPLEX FORM. THE PROCESS IS EMINENTLY SUITABLE FOR THE PRODUCTION OF P-AMINO-SUBSTITUTED DIARYLKETONES AND BASIC DYES AVOIDING THE USUAL POLLUTION PROBLEMS.
Inventors
- 👤 H Kast
- 👤 H Baumann
- 👤 U Mayer
- 👤 A Oberlinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:07
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; B01J31/2204; B01J31/2208; B01J31/2226; B01J31/2243; B01J31/006; B01J31/02; B01J31/0201; B01J31/0205; B01J31/0208; B01J31/0231; B01J31/0232; B01J31/18; B01J31/1805; B01J31/181; B01J31/1825; B01J31/183; C; C09; C09B; C09B11/00; C09B11/02; C09B11/04; C09B11/10; C09B11/12; C09B11/18; C09B11/24; B01J2231/00; B01J2231/70; B01J2531/00; B01J2531/02; B01J2531/0238; B01J2531/0241; B01J2531/025; B01J2531/0252; B01J2531/10; B01J2531/16; B01J2531/80; B01J2531/84; B01J2531/842; B01J2531/845
Claims Analysis
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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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |