US3558670A
Expired / Lapsed
US
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Tetra-alpha-substituted anthraquinones
Assignee: Bayer AG
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Filing: 1968-11-20
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Granted: 1971-01-26
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Expires: 1988-11-20
Abstract
Abstract QUINIZARIN DYESTUFFS HAVING ANILINOT, SUBSTITUTED ANILINO OR BENZYLAMINO SUBSTITUENTS IN THE 5-POSITION AND PHENYL MERCAPTO OR SUBSTITUTED PHENYL MERCAPTO SUBSTITUENTS IN THE 8-POSITION PARTICULARLY USEFUL FOR DYEING SYNTHETIC FIBERS, E.G. POLYETHYLENE TERPHTHALATE.
Inventors
- 👤 Walter Hohmann
- 👤 Hans-Samuel Bien
- 👤 Gunter Gehrke
- 👤 Heinrich Vollman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:17
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/52; H03C1/54; H03C1/56; H03C1/58; C; C08; C08K; C08K5/00; C08K5/36; C08K5/43; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/32; C09B1/36; C09B1/50; C09B1/56; C09B1/58; C09B31/00; C09B31/02; C09B31/08; D; D06; D06P; D06P1/00; D06P1/16; D06P1/20; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921; Y10S8/922; Y10S8/924
Claims Analysis
Total Claims: 0
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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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |