3507691

Information

• Patent Grant
• 3507691

• References
• Source

• Patent Number

  3,507,691

• Date Filed

  Not available

• Date Issued

  Tuesday, April 21, 1970
  54 years ago

• CPC

  • D21H17/52 - Epoxy resins
  • D21H3/00 - Paper or cardboard prepared by adding substances to the pulp or to the formed web on the paper-making machine and by applying substances to finished paper or cardboard (on the paper-making machine), also when the intention is to impregnate at least a part of the paper body
  • D21H17/45 - Nitrogen-containing groups

• US Classifications

  • 162 - Paper making and fiber liberation