3496254

Information

• Patent Grant
• 3496254

• References
• Source

• Patent Number

  3,496,254

• Date Filed

  Not available

• Date Issued

  Tuesday, February 17, 1970
  55 years ago

• CPC

  • G02B1/043 - Contact lenses
  • B29D11/00115 - made by rotational casting
  • B29D11/00932 - Combined cutting and grinding thereof
  • B29C41/04 - Rotational or centrifugal casting
  • B29L2011/0041 - Contact lenses
  • B29L2031/76 - Office equipment or accessories

• US Classifications

  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 351 - Optics: eye examining, vision testing and correcting
  • 523 - Synthetic resins or natural rubbers
  • 526 - Synthetic resins or natural rubbers