Patent US3597254A successfully refreshed from Google Patents.
US3597254A
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US
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Blue dye mixtures
Assignee: BASF SE
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Filing: 1968-10-02
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Granted: 1971-08-03
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Expires: 1988-10-02
Abstract
Abstract BLUE DYE MIXTURES WHICH ARE OUTSTANDINGLY SUITABLE FOR COLORING MINERAL OILS AND GASOLINES AND WHICH COMPRISE AT LEAST THREE DIFFERENT 1,4-DIAMINOANTHRAQUINONE DERIVATIVES WHOSE AMINO GROUPS BEAR HYDROCARBON RADICALS AND HYDROCARBON RADICALS CONTAINING ETHER GROUPS AS SUBSTITUENTS.
Inventors
- 👤 Fritz Graser
- 👤 Guenther Riedel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:11
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/003; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/28; C09B1/285; C09B1/50; C09B1/51; C09B1/515; C10M; C10M171/00; C10M171/007; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/068
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |