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US4312808A
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Red monoazo dyestuffs
Assignee: Novartis Corp
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Filing: 1980-01-11
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Granted: 1982-01-26
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Expires: 2000-01-11
Abstract
Abstract Red monoazo dyestuffs from diazotized 1-aminobenzene-2-sulphonic acid-N-methyl-N-cyclohexylamide or 1-amino-4-, -5- or -6-methyl-benzene-2-sulphonic acid-N-methyl-N-cyclohexylamide and 2-amino-8-hydroxynaphthalene-6-sulphonic acid are disclosed which are particularly distinguished by their good migration and levelling properties and excellent fastness to light. Said dyestuffs are moreover suitable for obtaining very even combination dyeings together with known blue or yellow acid dyestuffs. These dyestuffs are particularly suited for the dyeing of carpeting, upholstery fabrics and drapery materials.
Inventors
- 👤 Paul Lienhard
- 👤 Fabio Beffa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:25
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/24; C09B29/28; C09B29/30; C09B69/00; C09B69/02; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917; Y10S8/92; Y10S8/924; Y10S8/926; Y10S8/928
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
23 words
A red monoazo dyestuff of Formula I ##STR6## wherein X 1 represents hydrogen or the methyl group, and M.sup.⊕ represents a colorless cation.
Claim 2
Dependent Claim
23 words
A red monoazo dyestuff of Formula I ##STR6## wherein X 1 represents hydrogen or the methyl group, and M.sup.⊕ represents a colorless cation.
Claim 3
Dependent Claim
19 words
A red monoazo dyestuff as defined in claim 1, of the Formula ##STR7## wherein M.sup.⊕ represents the sodium cation.
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) | 1985-01-25 | 1985-07-27 | 1986-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-25 | 1989-07-27 | 1990-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-25 | 1993-07-27 | 1994-01-26 | $7700.00 | Window Closed / Lapsed |