3830897

Information

• Patent Grant
• 3830897

• References
• Source

• Patent Number

  3,830,897

• Date Filed

  Not available

• Date Issued

  Tuesday, August 20, 1974
  50 years ago

• CPC

  • B29C44/1242 - the preformed parts being concentric
  • B29C33/44 - with means for , or specially constructed to facilitate, the removal of articles
  • B29L2031/10 - Building elements
  • Y10S264/57 - Processes of forming layered products
  • Y10S264/67 - forming ring-like structure
  • Y10S264/77 - Processes of molding urethanes
  • Y10S264/78 - Processes of molding using vacuum
  • Y10T428/24355 - Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]

• US Classifications

  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 428 - Stock material or miscellaneous articles