3423488

Information

• Patent Grant
• 3423488

• References
• Source

• Patent Number

  3,423,488

• Date Filed

  Not available

• Date Issued

  Tuesday, January 21, 1969
  56 years ago

• CPC

  • B29C39/42 - Casting under special conditions
  • B29C33/3857 - by making impressions of one or more parts of models
  • B29C39/26 - Moulds or cores
  • B29C39/40 - Compensating volume change
  • B29D11/00442 - Curing the lens material
  • B29K2035/00 - Use of polymers of unsaturated polycarboxylic acids or derivatives thereof as moulding material
  • B29K2823/06 - PE
  • B29L2011/0016 - Lenses
  • Y10S425/808 - Lens mold

• US Classifications

  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 351 - Optics: eye examining, vision testing and correcting
  • 425 - Plastic article or earthenware shaping or treating: apparatus