3904800

Information

• Patent Grant
• 3904800

• References
• Source

• Patent Number

  3,904,800

• Date Filed

  Not available

• Date Issued

  Tuesday, September 9, 1975
  49 years ago

• CPC

  • D21H27/40 - at least one of the sheets being non-planar
  • B31F1/2886 - Additionally reinforcing
  • D21H27/34 - Continuous materials
  • Y10T156/1025 - to form undulated to corrugated sheet and securing to base with parts of shaped areas out of contact
  • Y10T428/24694 - Parallel corrugations
  • Y10T428/24727 - with planar component
  • Y10T428/249926 - Including paper layer

• US Classifications

  • 428 - Stock material or miscellaneous articles
  • 156 - Adhesive bonding and miscellaneous chemical manufacture