3867498

Information

• Patent Grant
• 3867498

• References
• Source

• Patent Number

  3,867,498

• Date Filed

  Not available

• Date Issued

  Tuesday, February 18, 1975
  50 years ago

• CPC

  • E04B1/86 - slab-shaped
  • E04B2001/8245 - Machines for manufacturing, shaping, piercing or filling sound insulating elements
  • E04B2001/848 - the cavities opening onto the face of the element

• US Classifications

  • 264 - Plastic and nonmetallic article shaping or treating: processes