← Back to Patent Explorer
US3719657A Expired / Lapsed US ⏱️ 0.0 years remaining

Monoazo dyestuffs containing a carboxamido-4(3h)-quinazolone group

Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1970-01-12
•
Granted: 1973-03-06
•
Expires: 1990-01-12
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract COMPOUNDS OF THE FORMULAE: 1-((2-R3,3-R4,4-R5,5-R6,6-R7-PHENYL)-N=N-),2-(HO-),3- ((2-R2,R8,R9,R10-3,4-DIHYDROQUINAZOLIN-4-ONYL)-NH-CO-) NAPHTHALENE 1-((2-R3,3-R4,4-R5,5-R6,6-R7-PHENYL)-N=N-),2-(HO-),3- ((2-R2,R8,R9,R10-3,4-DIHYDROQUINAZOLIN-4-ONYL)-NH-CO-) CARBAZOLE 1-((2-R3,3-R4,4-R5,5-R6,6-R7-PHENYL)-N=N-),2-(HO-),3- ((2-R2,R8,R9,R10-3,4-DIHYDROQUINAZOLIN-4-ONYL)-NH-CO-) DIBENZOFURAN WHEREIN R2 IS HYDROGEN, C1-C4 ALKYL, C1-C4 ALKOXY (FOR SECOND AND THIRD FORMULAE ONLY), PHENYL, BENZYL OR METHYL-, METHOXY- OR CHLORINE- SUBSTITUTED BENZYL, EACH OF R3, R4, R5, R6 AND R7 IS HYDROGEN, CHLORINE, BROMINE, C1-C4 ALKYL, C1-C4 ALKOXY, NITRO, CYANO, TRIFLUOROMETHHYL, C1-C4 ALKOXYCARBONYL, C1-C4 ALKYLSULFONYL, PHENYLSULFONYL, UREIDO, CARBAMOYL, N-C1-C4 ALKYLCARBAMOYL, NPHENYLCARBAMOYL, SULFAMOYL, N-C1-C4 ALKYLSULFAMOYL, N-PHENYLSULFAMOYL, ACETYL, PROPIONYL, BUTYRYL, PHENYLACETYL, BENZOYL, ACETYLAMINO, PROPIONYLAMINO, BUTYRYLAMINO, PHENYLACETYLAMINO OR BENZOYLAMINO, AND EACH OF R8, R9 AND 10 IS HYDROGEN, CHLORINE, BROMINE, C1-C4 ALKYL OR C1-C4 ALKOXY, ARE PROVIDED, WHICH ARE USEFUL AS WATER INSOLUBLE DYSTUFFS CHARACTERIZED BY HIGH FASTNESS TO SOLVENTS, MIGRATION AND LIGHT.

Inventors

  • 👤 K Hama
  • 👤 N Mishima
  • 👤 K Miyamoto

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 01:15
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/32

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-03-05 1976-09-04 1977-03-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-03-05 1980-09-04 1981-03-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-03-05 1984-09-04 1985-03-06 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag