US4234481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yellow pyrazolone ester dyes for heat transfer printing
Assignee: Crompton and Knowles Corp
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Filing: 1977-11-30
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Granted: 1980-11-18
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Expires: 1997-11-30
Abstract
Abstract The application is concerned with new pyrazolone compounds having the structure: ##STR1## wherein R is hydrogen or halogen (especially fluorine, bromine and chlorine) and R 1 and R 2 independently of one another are hydrogen or halogen (especially bromine and chlorine) and R 3 is lower alkyl (especially methyl, ethyl, propyl and butyl). The compounds are useful in heat transfer printing of polyester fabrics and impart yellow shades thereto. The application discloses a method of making the new compounds and discusses the utilization of the compounds in the heat transfer printing of polyester fabrics, in the preparation of ink formulations, and in making transfer sheets for heat transfer printing.
Inventors
- 👤 Russell I. Steiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:53
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3647; C09B29/3652; C09B29/366
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
32 words
A compound of the formula ##STR9## where R is hydrogen or halogen, and R 1 and R 2 independently of one another are hydrogen, or halogen, and R 3 is lower alkyl.
Claim 2
Dependent Claim
32 words
A compound of the formula ##STR9## where R is hydrogen or halogen, and R 1 and R 2 independently of one another are hydrogen, or halogen, and R 3 is lower alkyl.
Claim 3
Dependent Claim
21 words
A compound according to claim 1 wherein R, R 1 , and R 2 are hydrogen, and R 3 is ethyl.
Claim 4
Dependent Claim
22 words
A compound according to claim 1 wherein R is chlorine, R 1 and R 2 are hydrogen, and R 3 is ethyl.
Claim 5
Dependent Claim
28 words
A compound according to claim 1 where R is chlorine, R 1 is hydrogen, R 2 is chlorine positioned ortho to the nitrogen and R 3 is ethyl.
Claim 6
Dependent Claim
28 words
A compound according to claim 1 wherein R, is chlorine, R 1 is hydrogen, R 2 is chlorine positioned para to the nitrogen and R 3 is ethyl.
Claim 7
Dependent Claim
20 words
A compound according to claim 1 wherein R, R 1 and R 2 are chlorine and R 3 is ethyl.
Claim 8
Dependent Claim
44 words
The method of making a compound according to claim 1 comprising diazotizing 2-amino-5-halobenzotrifluoride, coupling the diazonium salt to a pyrazolone of the formula: ##STR10## wherein R 1 and R 2 independently of one another are hydrogen or halogen, and R 3 is lower alkyl.
Claim 9
Dependent Claim
23 words
A compound according to any of claims 1, 2 or 3 wherein the dye is ground to particle size less than 3 micron.
Claim 10
Dependent Claim
23 words
A compound according to any of claims 4, 5 or 6 wherein the dye is ground to particle size less than 3 micron.
References Cited (Backward Citations)
US1809030A
Cited
US2439798A
Cited
CH305009A
Cited
GB763555A
Cited
US3019217A
Cited
CH386590A
Cited
DE2347124A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-18 | 1984-05-19 | 1984-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-18 | 1988-05-19 | 1988-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-18 | 1992-05-19 | 1992-11-18 | $7700.00 | Window Closed / Lapsed |