Patents by Inventor Huan K. Toh

Huan K. Toh 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).

  • Cross-linkable polymeric composition
    Patent number: 5502139
    Abstract: A cross-linkable polymeric casting composition includinga fluorene diacrylate or dimethacrylate monomer; anda comonomer including a polymerisable double bond.
    Type: Grant
    Filed: April 20, 1995
    Date of Patent: March 26, 1996
    Assignee: Sola International Holdings Ltd.
    Inventors: Huan K. Toh, Chong M. Kok
  • Casting composition
    Patent number: 5373033
    Abstract: A cross-linkable polymeric casting composition includingA) a polyoxy alkylene glycol diacrylate or dimethacrylate;B) a monomer having a recurring unit derived from at least one radical-polymerisable bisphenol monomer capable of forming a homopolymer having a refractive index of more than 1.55; andC) a urethane monomer having 2 to 6 terminal groups selected from a group comprising acrylic and methacrylic groups.
    Type: Grant
    Filed: February 1, 1994
    Date of Patent: December 13, 1994
    Assignee: Sola International Holdings Limited
    Inventors: Huan K. Toh, Chong M. Kok, Michael Pittolo
  • Cross-linkable casting compositions
    Patent number: 4912185
    Abstract: A cross-linkable polymeric casting composition including at least polyoxyalkylene glycol diacrylate or dimethacrylate and at least one polyfunctional unsaturated cross-linking agent. The casting composition may be utilized in the manufacture of plastic optical articles such as video discs and ophthalmic lenses.
    Type: Grant
    Filed: November 23, 1987
    Date of Patent: March 27, 1990
    Assignee: Sola International Holdings Ltd.
    Inventor: Huan K. Toh