US3822992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaustion dyeing process with anthraquinone dyestuffs in water immiscible organic solvent
Assignee: Bayer AG
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Filing: 1973-02-28
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Granted: 1974-07-09
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Expires: 1993-02-28
Abstract
Abstract NEW ANTHRAQUINONE DYESTUFFS OF THE FORMULA 1-(H2N-),2-(HO-CH2-CH(-OH)-CH2-S-),4-X-ANTHRAQUINONE IN WHICH X DENOTES A HYDROXYL, C1-C6-ALKYL-CARBONYLAMINO, C1-C6 - ALKYL - SULPHONYLAMINE, C1-C6-ALKOXY-CARBONYLAMINO, OPTIONALLY SUBSTITUTED ARYL-CARBONYLAMINO, ARYL-SULPHONYLAMINO, ARYLOXY-CARBONYLAMINO OR HETEROYLAMINO GROUP AND THEIR PREPARATION FROM CORRESPONDING 2HALOGEN-ANTHRAQUINONES. THEY ARE USED FOR DYEING SYNTHETIC FIBRE MATERIALS FROM ORGANIC SOLVENTS, ESPECIALLY FROM THOSE WHICH ARE IMMISCIBLE WITH WATER ACCORDING TO THE EXHAUSTION PROCESS.
Inventors
- 👤 V Hederich
- 👤 G Gehrke
- 👤 H Bien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:48
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/90; D06P1/92; D06P1/922; C; C09; C09B; C09B1/00; C09B1/56; C09B1/58; C09B1/60; D06P1/908; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921; Y10S8/922; Y10S8/924; Y10S8/927
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) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |