3924992

Information

• Patent Grant
• 3924992

• References
• Source

• Patent Number

  3,924,992

• Date Filed

  Not available

• Date Issued

  Tuesday, December 9, 1975
  49 years ago

• CPC

  • F16L9/127 - the walls consisting of a single layer
  • B29C47/24 - with die parts rotatable relative to each other
  • B29C49/0021 - using moulds or mould parts movable in a closed path
  • B29B2911/14346 - Internal separating wall
  • B29C47/0023 - Hollow rigid articles having only one tubular passage
  • B29C47/0028 - Multi-passage hollow articles
  • B29C47/0033 - Articles having longitudinal irregularities
  • B29C47/0061 - Extrusion moulding combined with surface shaping
  • B29C2791/006 - Using vacuum
  • B29L2023/18 - Pleated or corrugated hoses
  • B29L2024/006 - multi-channelled
  • B29L2031/60 - Multitubular or multicompartmented articles

• US Classifications

  • 425 - Plastic article or earthenware shaping or treating: apparatus