TREA

Donald H. Petcen

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  • Colonial Heights, VA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Cartridge for a dispenser of reactive chemicals
    • Patent number 5,211,311
    • Issue date May 18, 1993
    • E.R. Carpenter Company, Inc.
    • Donald H. Petcen
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Dispenser for reactive chemicals
    • Patent number 5,090,814
    • Issue date Feb 25, 1992
    • E.R. Carpenter Company, Inc.
    • Donald H. Petcen
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Wrinkle prevention in glass/plastic composite lenses
    • Patent number 4,543,146
    • Issue date Sep 24, 1985
    • Coburn Optical Industries, Inc.
    • Donald H. Petcen
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Method and apparatus for molding ophthalmic lenses
    • Patent number 4,540,532
    • Issue date Sep 10, 1985
    • Coburn Optical Industries, Inc.
    • Donald H. Petcen
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Wrinkle prevention frame for lens manufacture
    • Patent number 4,494,344
    • Issue date Jan 22, 1985
    • Coburn Optical Industries, Inc.
    • Donald H. Petcen
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Controlled wafer relaxing in making composite lenses
    • Patent number 4,495,015
    • Issue date Jan 22, 1985
    • Coburn Optical Industries, Inc.
    • Donald H. Petcen
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL