3304297

Information

• Patent Grant
• 3304297

• References
• Source

• Patent Number

  3,304,297

• Date Filed

  Not available

• Date Issued

  Tuesday, February 14, 1967
  57 years ago

• CPC

  • G01N31/221 - for investigating pH value
  • C08B15/06 - containing nitrogen
  • C08B31/00 - Preparation of derivatives of starch
  • C08B37/00 - Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00 Derivatives thereof
  • C08F8/00 - Chemical modification by after-treatment
  • C09B69/00 - Dyes not provided for by a single group of this subclass
  • C09B69/106 - containing an azo dye
  • D01F2/16 - Addition of dyes to the spinning solution

• US Classifications

  • 534 - Organic compounds
  • 008 - Bleaching and dyeing
  • 525 - Synthetic resins or natural rubbers
  • 536 - Organic compounds
  • 540 - Organic compounds
  • 544 - Organic compounds
  • 549 - Organic compounds