Patents by Inventor Masayuki Maenaka

Masayuki Maenaka 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).

  • Method for producing air-quench-toughened glass plate
    Patent number: 7213415
    Abstract: In a process for producing an air-quench-toughened glass plate, defective glass plates containing nickel sulfide (NiS) are removed by compulsory breaking the glass plates. Such compulsory breakage is carried out in the course of a batch-manner soaking process carried out after a toughening step; in the course of a toughening step carried out after generation of cracks in an annealing step; in the course of a toughening step carried out after generation of cracks in a pretreatment step; or in the course of a continuous annealing step carried out after a toughening step. Through the method, NiS-free toughened glass plates of high-quality can be produced.
    Type: Grant
    Filed: June 13, 2003
    Date of Patent: May 8, 2007
    Assignee: Nippon Sheet Glass Company, Limited
    Inventors: Chihiro Sakai, Masashi Kikuta, Masayuki Maenaka
  • Method for producing air-quench-toughened glass plate
    Publication number: 20030205062
    Abstract: In a process for producing an air-quench-toughened glass plate, defective glass plates containing nickel sulfide (NiS) are removed by compulsory breaking the glass plates. Such compulsory breakage is carried out in the course of a batch-manner soaking process carried out after a toughening step; in the course of a toughening step carried out after generation of cracks in an annealing step; in the course of a toughening step carried out after generation of cracks in a pretreatment step; or in the course of a continuous annealing step carried out after a toughening step. Through the method, NiS-free toughened glass plates of high-quality can be produced.
    Type: Application
    Filed: June 13, 2003
    Publication date: November 6, 2003
    Inventors: Chihiro Sakai, Masashi Kikuta, Masayuki Maenaka
  • Method for producing air-quench-toughened glass plate
    Patent number: 6609394
    Abstract: In a process for producing an air-quench-toughened glass plate, defective glass plates containing nickel sulfide (NiS) are removed by compulsory breaking the glass plates. Such compulsory breakage is carried out in the course of a batch-manner soaking process carried out after a toughening step; in the course of a toughening step carried out after generation of cracks in an annealing step; in the course of a toughening step carried out after generation of cracks in a pretreatment step; or in the course of a continuous annealing step carried out after a toughening step. Through the method, NiS-free toughened glass plates of high quality can be produced.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: August 26, 2003
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventors: Chihiro Sakai, Masashi Kikuta, Masayuki Maenaka