Patent US4166822A successfully refreshed from Google Patents.
US4166822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Branched-chain alkyl amino anthraquinones
Assignee: Bayer AG
•
Filing: 1977-01-26
•
Granted: 1979-09-04
•
Expires: 1997-01-26
Abstract
Abstract Use of the dyestuffs of the formula ##STR1## wherein R, Y and X have the meaning given in the description, for the dyeing of synthetic textiles, especially those of aromatic polyesters, by the transfer printing process. Prints obtained are distinguished by good fastness in use properties.
Inventors
- 👤 Walter Hohmann
- 👤 Werner Kuhnel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:32
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/003; D06P5/004; C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/28; C09B1/50; C09B1/51; C09B1/515; C09B1/54; C09B1/545; C09B67/00; C09B67/0071; C09B67/008; D06P5/006
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
32 words
Anthraquinone compound of the formula: ##STR94## wherein Q 1 is methyl; Q 2 is methyl or ethyl; Y 1 is bromo, isopropylamino, sec-butylamino, cyclohexylamino, or methylcyclohexylamino; and Z is hydrogen or methyl.
Claim 2
Dependent Claim
32 words
Anthraquinone compound of the formula: ##STR94## wherein Q 1 is methyl; Q 2 is methyl or ethyl; Y 1 is bromo, isopropylamino, sec-butylamino, cyclohexylamino, or methylcyclohexylamino; and Z is hydrogen or methyl.
Claim 3
Dependent Claim
17 words
Compound according to claim 1, wherein Q 1 and Q 2 =CH 3 Y 1 =cyclohexylamino Z=h
Claim 4
Dependent Claim
16 words
anthraquinone compound of claim 1 wherein Q 2 =ch 3 ; y 1 =sec-butylamino; and Z=h.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-03 | 1983-03-05 | 1983-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-03 | 1987-03-05 | 1987-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-03 | 1991-03-05 | 1991-09-04 | $7700.00 | Window Closed / Lapsed |