Patents by Inventor Natrada WIWATTANAPONGPAN

Natrada WIWATTANAPONGPAN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11207855
    Abstract: The invention provides a machine for manufacturing an ophthalmic article molded by casting and having a straight peripheral edge, comprising a mold assembly (2) having first and second molding shells (10, 13) provided with first and second predetermined molding surfaces (12, 14) and facing to each other, an adhesive tape member (20) joining said shells for forming a molding cavity (8), having a Young's modulus greater than 200 MPa and a maximum shear stress smaller than 0.05 MPa when measured at a temperature of polymerization of a molding material, and also configured to form a peripheral case of the mold assembly in which said first molding shell is able to be displaced relative to the second molding shell without affecting an intermediate portion (22) of the adhesive tape member which define said cavity, and a filling aperture formed in said adhesive tape member for introducing by casting said material into said cavity for forming the article.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: December 28, 2021
    Assignee: Essilor International
    Inventors: Laurent Chippaux, Somporn Wichitworatham, Natrada Wiwattanapongpan
  • Publication number: 20190344517
    Abstract: The invention provides a machine for manufacturing an ophthalmic article molded by casting and having a straight peripheral edge, comprising a mold assembly (2) having first and second molding shells (10, 13) provided with first and second predetermined molding surfaces (12, 14) and facing to each other, an adhesive tape member (20) joining said shells for forming a molding cavity (8), having a Young's modulus greater than 200 MPa and a maximum shear stress smaller than 0.05 MPa when measured at a temperature of polymerization of a molding material, and also configured to form a peripheral case of the mold assembly in which said first molding shell is able to be displaced relative to the second molding shell without affecting an intermediate portion (22) of the adhesive tape member which define said cavity, and a filling aperture formed in said adhesive tape member for introducing by casting said material into said cavity for forming the article.
    Type: Application
    Filed: June 13, 2017
    Publication date: November 14, 2019
    Inventors: Laurent CHIPPAUX, Somporn WICHITWORATHAM, Natrada WIWATTANAPONGPAN