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US3971741A Expired / Lapsed US ⏱️ 0.0 years remaining

Water-insoluble polyazo dyestuff comprising two or three identical azo dyestuffs joined to a central nucleus by carboxyl bridges

Assignee: Bayer AG
•
Filing: 1974-07-09
•
Granted: 1976-07-27
•
Expires: 1994-07-09
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Abstract

Abstract Waterinsoluble polyazo dyestuffs of the formula X(O-OC-D-N=N-K).sub.m In which K denotes identical or different radicals of a coupling component, X denotes an aliphatic radical which is free of hydroxyl groups and is optionally interrupted by heteroatoms, or an aromatic-carbocyclic, aromatic-heterocyclic or araliphatic radical, D represents an aromatic-carbocyclic or aromatic-heterocyclic radical and m represents the numbers 2 or 3. These dyestuffs are useful as dispersion dyestuffs for coloring synthetic fibers and most especially as pigment dyestuffs for coloring paint, inks, paper, and macromolecular substances and for admixing with other substances such as inorganic white pigments including titanium dioxide.

Inventors

  • 👤 Georg Dehmel
  • 👤 Johannes Blahak

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 21:47
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B43/00; C09B43/30; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24777; Y10T428/31504; Y10T428/31507; Y10T428/31786; Y10T428/31855

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 112 words
Polyazo dyestuff of the formula ##SPC17## wherein X 1 is ##EQU3## phenylene, naphthylene, diphenylene, chloronaphthalene, chlorophenylene, chlorodiphenylene, methylphenylene, methylnaphthalene, methyldiphenylene, or ##SPC18## R 3 and R 4 , independently of each other, are hydrogen, alkyl of 1-4 carbon atoms, alkoxy of 1-4 carbon atoms, chloro, bromo, alkylcarbonylamino of 2-5 carbon atoms, alkoxycarbonyl of 2-5 carbon atoms, phenoxy, nitro, cyano, trifluoromethyl, carbamyl, phenylcarbonylamino, phenyloxamido, phenylcarbamyl, or any of said last three radicals which is further substituted by chloro, bromo, alkyl of 1-2 carbon atoms or alkoxy of 1-2 carbon atoms, R 5 is hydrogen, chloro, bromo, alkyl of 1-2 carbon atoms or alkoxy of 1-2 carbon atoms, and m if 2 or 3.
Claim 2
Dependent Claim 112 words
Polyazo dyestuff of the formula ##SPC17## wherein X 1 is ##EQU3## phenylene, naphthylene, diphenylene, chloronaphthalene, chlorophenylene, chlorodiphenylene, methylphenylene, methylnaphthalene, methyldiphenylene, or ##SPC18## R 3 and R 4 , independently of each other, are hydrogen, alkyl of 1-4 carbon atoms, alkoxy of 1-4 carbon atoms, chloro, bromo, alkylcarbonylamino of 2-5 carbon atoms, alkoxycarbonyl of 2-5 carbon atoms, phenoxy, nitro, cyano, trifluoromethyl, carbamyl, phenylcarbonylamino, phenyloxamido, phenylcarbamyl, or any of said last three radicals which is further substituted by chloro, bromo, alkyl of 1-2 carbon atoms or alkoxy of 1-2 carbon atoms, R 5 is hydrogen, chloro, bromo, alkyl of 1-2 carbon atoms or alkoxy of 1-2 carbon atoms, and m if 2 or 3.

References Cited (Backward Citations)

US2286391A Cited
US2554141A Cited
US2544087A Cited
US2612496A Cited
US2773055A Cited
US2888452A Cited
US3211717A Cited
US3342801A Cited
US3663530A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-07-27 1980-01-26 1980-07-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-07-27 1984-01-26 1984-07-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-07-27 1988-01-26 1988-07-27 $7700.00 Window Closed / Lapsed

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