← Back to Patent Explorer
US3926944A Expired / Lapsed US ⏱️ 0.0 years remaining

Water-soluble cellulose reactive azo dyestuffs containing 3-azo-2-hydroxy-N-subnstituted pyrid-6-one radical

Assignee: Imperial Chemical Industries Ltd
•
Filing: 1973-08-10
•
Granted: 1975-12-16
•
Expires: 1993-08-10
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract IN WHICH T1 is H, phenyl, anisyl, NH2, or lower alkyl, T2 is H, CN, lower alkyl, CONH2 or substituted aminocarbonyl, Z is R, HOR''-, ROR''-, R2NR''-, phenyl or anisyl, (R and R'' are lower alkyl and lower alkylene) the diazo component carrying a cellulosereactive group. Also included are dyes in which the reactive group also contains an anthraquinone or phthalocyanine residue or where two moles of the dye are linked through a diamine radical. Cr and Co complexes of dyes in which the diazo component is a oaminophenol are included. D R A W I N G A new class of cellulose reactive dyes have a sulphonated benzene, naphthalene or azobenzene diazo component coupled on to a class of coupling components of the formula:

Inventors

  • 👤 Alistair Howard Berrie
  • 👤 Richard Budziarek

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 12:09
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/002; C09B62/006; C09B62/0067; C09B62/02; C09B62/04; C09B62/043

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 6 words
AN AZO DYESTUFF HAVING THE FORMULA
Claim 2
Dependent Claim 6 words
AN AZO DYESTUFF HAVING THE FORMULA
Claim 3
Dependent Claim 24 words
The azo dyestuff of claim 1 wherein T1 represents CH3, Z represents C2H5 and T2 represents -(CONH)n 1H where n is 1 or 2.
Claim 4
Dependent Claim 9 words
The azo dyestuff of claim 1 having the formula:
Claim 5
Dependent Claim 9 words
The azo dyestuff of claim 1 having the formula:
Claim 6
Dependent Claim 9 words
The azo dyestuff of claim 1 having the formula:
Claim 7
Dependent Claim 9 words
The azo dyestuff of claim 1 having the formula:
Claim 8
Dependent Claim 9 words
The azo dyestuff of claim 1 having the formula:
Claim 9
Dependent Claim 9 words
The azo dyestuff of claim 1 having the formula:
Claim 10
Dependent Claim 9 words
The azo dyestuff of claim 1 having the formula:

References Cited (Backward Citations)

US2431190A Cited
US2860129A Cited
US2910464A Cited
US3135731A Cited
US3438962A Cited
US3487066A Cited
US3501453A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-12-15 1979-06-16 1979-12-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-12-15 1983-06-16 1983-12-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-12-15 1987-06-16 1987-12-16 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag