3825441

Information

• Patent Grant
• 3825441

• References
• Source

• Patent Number

  3,825,441

• Date Filed

  Not available

• Date Issued

  Tuesday, July 23, 1974
  50 years ago

• CPC

  • D21H23/68 - whereby the paper moves continuously
  • D21H21/56 - Foam
  • D21H23/30 - Pretreatment of the paper
  • D21H23/50 - Spraying or projecting
  • Y10T156/1025 - to form undulated to corrugated sheet and securing to base with parts of shaped areas out of contact

• US Classifications

  • 427 - Coating processes
  • 156 - Adhesive bonding and miscellaneous chemical manufacture