Patent US4200570A successfully refreshed from Google Patents.
US4200570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
5-Halo-2-trifluoromethylphenylazo-pyrazolones
Assignee: Crompton and Knowles Corp
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Filing: 1977-08-04
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Granted: 1980-04-29
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Expires: 1997-08-04
Abstract
Abstract New yellow azo pyrazolone compounds having the structure ##STR1## wherein R is halogen and R 1 and R 2 are hydrogen, lower alkyl or halogen. The compounds are useful as yellow dyes in heat transfer printing of synthetic fabrics.
Inventors
- 👤 Russell I. Steiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:10
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3647; C09B29/3652; C09B29/366
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
26 words
A compound of the formula ##STR9## where R is halogen, and R 1 and R 2 independently of one another are hydrogen, lower alkyl or halogen.
Claim 2
Dependent Claim
26 words
A compound of the formula ##STR9## where R is halogen, and R 1 and R 2 independently of one another are hydrogen, lower alkyl or halogen.
Claim 3
Dependent Claim
18 words
A compound according to claim 1 wherein R is chlorine and R 1 and R 2 are hydrogen.
Claim 4
Dependent Claim
24 words
A compound according to claim 1 where R is chlorine, R 1 is hydrogen and R 2 is chlorine positioned ortho to the nitrogen.
Claim 5
Dependent Claim
24 words
A compound according to claim 1 wherein R is chlorine, R 1 is hydrogen and R 2 is chlorine positioned para to the nitrogen.
Claim 6
Dependent Claim
15 words
A compound according to claim 1 wherein R, R 1 and R 2 are chlorine.
Claim 7
Dependent Claim
18 words
A compound according to claim 1 wherein the compound is ground to particle size less than 3 micron.
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) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |