US3862967A
Expired / Lapsed
US
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Tetra-{60 -substituted anthraquinone derivatives
Assignee: Bayer AG
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Filing: 1968-12-05
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Granted: 1975-01-28
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Expires: 1988-12-05
Abstract
Abstract Anthraquinone dyestuffs of the formula: WHEREIN X is hydroxyl or amino; Y is hydrogen, chlorine or bromine; R is chlorine, amino, acid amide radical, or mercapto; and R1 is an amino group which may be unsubstituted or substituted, an acid amide radical, or mercapto. A process for dyeing and printing synthetic fibers using the abovedescribed dyestuffs.
Inventors
- 👤 Walter Hohmann
- 👤 Heinrich Vollmann
- 👤 Hans-Samuel Bien
- 👤 Gunter Gehrke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:35
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/56; C09B1/16; C09B1/20; C09B1/50; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921; Y10S8/922
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
4 words
COMPOUNDS OF THE FORMULA
Claim 2
Dependent Claim
4 words
COMPOUNDS OF THE FORMULA
Claim 3
Dependent Claim
5 words
The compound of the formula
Claim 4
Dependent Claim
5 words
The compound of the formula
Claim 5
Dependent Claim
5 words
The compound of the formula
Claim 6
Dependent Claim
5 words
The compound of the formula
References Cited (Backward Citations)
US2053275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |