Patents by Inventor Siong Hui Khoo

Siong Hui Khoo 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: 11390743
    Abstract: The present invention relates to an elastomeric composition, wherein the elastomeric composition comprises an additive selected from any one or a combination of fluorine and silicone compounds in the production of a hypoallergenic elastomeric article.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: July 19, 2022
    Assignee: INOOVA MATERIAL SCIENCE SDN BHD
    Inventor: Siong Hui Khoo
  • Publication number: 20200399450
    Abstract: The present application relates to a crosslinked composition. The composition comprises an elastomer, a silane compound, a liquid fluorocarbon and a crosslinker, preferably an epoxy silane. The crosslinked composition may be used in the production of any elastomeric article manufactured through a dipping process, such as a glove.
    Type: Application
    Filed: February 8, 2019
    Publication date: December 24, 2020
    Inventor: Siong Hui KHOO
  • Publication number: 20200087510
    Abstract: The present invention relates to an elastomeric composition, wherein the elastomeric composition comprises an additive selected from any one or a combination of fluorine and silicone compounds in the production of a hypoallergenic elastomeric article.
    Type: Application
    Filed: December 20, 2017
    Publication date: March 19, 2020
    Inventor: Siong Hui KHOO
  • Patent number: 9326557
    Abstract: A glove is formed from elastomer having Mooney viscosity, ML(1+4)(100° C.) of 100-220, that contains 25-30 weight % of acrylonitrile, 62-71 weight % of butadiene and 4-8 weight % of unsaturated carboxylic acid, and does not contain sulfur crosslinking agents or vulcanization accelerators. The unsaturated carboxylic acid comprises a first fraction of substituents and a second fraction of substituents, the first fraction of substituents forming cross-links via bonds with each other, and the second fraction of substituents forming cross-links via bonds with a bivalent metal. Glove properties include thickness 0.05-0.15 mm, swelling ratio 240-320, tensile stress 22-35 MPa, elongation to break 480-620%, and tensile stress at 500% elongation 15-35 MPa. By chlorine treatment of both inner and outer surfaces of the glove, the inner surface has decreased tackiness and the outer surface has increased smoothness. Content of metal and metallic salt impurities and an anion contained in the glove is decreased.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: May 3, 2016
    Assignees: KOSSAN SDN BHD, MIDORI ANZEN CO., LTD
    Inventors: Siong Hui Khoo, Lawrence Siau Tian Lim, Seek Ping Lee, Eng Long Ong, Norihide Enomoto
  • Patent number: 9267021
    Abstract: An elastomer composition comprising, an emulsion which comprises 25-30 weight % of acrylonitrile, 62-71 weight % of butadiene and 4-8 weight % of unsaturated carboxylic acid (total 100 weight %), wherein crosslink is formed by a bond through at least a part of substituent which is possessed by said unsaturated carboxylic acid, and residual substituent of at least one part of substituent which is possessed by said unsaturated carboxylic acid is left in state of free, further Mooney viscosity (ML(1+4)(100° C.)) of the crosslinked product is 100-220, wherein thin film gloves composed of said elastomer does not contain sulfur which is a crosslinking agent and sulfur composition which is a vulcanization accelerator, thickness is 0.05-0.15 mm, gloves swelling ratio at gloves formation is 240-320, tensile stress is 22-35 MPa, elongation to break is 480-620% and tensile stress at 500% elongation is 15-35 MPa.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: February 23, 2016
    Assignees: KOSSAN SDN BHD, MIDORI ANZEN CO., LTD
    Inventors: Siong Hui Khoo, Lawrence Siau Tian Lim, Seek Ping Lee, Eng Long Ong, Norihide Enomoto
  • Patent number: 9243117
    Abstract: A composition for producing an elastomeric thin film comprising a carboxylated acrylonitrile polybutadiene latex which is vulcanized without the use of conventional sulphur and accelerators thereby reducing the possibility of contacting immediate Type I hypersensitivity and delay Type IV hypersensitivity caused by the presence of natural rubber latex proteins and accelerators respectively. The dipping process for making gloves by using a latex composition provided by: premixing carboxylated acrylonitrile polybutadiene latex with methacrylic acid, or alternatively using a self-crosslinked latex, adding zinc oxide, adjusted to 9 to 10 of the pH level, and diluted with water to obtain 18% to 30% by weight of total solid content; dipping the glove former into the composition to form a layer of thin film of the latex composition on the former; drying the thin latex film on the former and crosslinking the latex film on the former.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: January 26, 2016
    Assignees: KOSSAN SDN BHD, MIDORI ANZEN CO., LTD
    Inventors: Siong Hui Khoo, Lawrence Siau Tian Lim, Seek Ping Lee, Eng Long Ong, Norihide Enomoto
  • Publication number: 20130198933
    Abstract: An elastomer composition comprising, an emulsion which comprises 25-30 weight % of acrylonitrile, 62-71 weight % of butadiene and 4-8 weight % of unsaturated carboxylic acid (total 100 weight %), wherein crosslink is formed by a bond through at least a part of substituent which is possessed by said unsaturated carboxylic acid, and residual substituent of at least one part of substituent which is possessed by said unsaturated carboxylic acid is left in state of free, further Mooney viscosity (ML(1+4)(100° C.)) of the crosslinked product is 100-220, wherein thin film gloves composed of said elastomer does not contain sulfur which is a crosslinking agent and sulfur composition which is a vulcanization accelerator, thickness is 0.05-0.15 mm, gloves swelling ratio at gloves formation is 240-320, tensile stress is 22-35 MPa, elongation to break is 480-620% and tensile stress at 500% elongation is 15-35 MPa.
    Type: Application
    Filed: September 30, 2011
    Publication date: August 8, 2013
    Applicants: MIDORI ANZEN CO., LTD, KOSSAN SDN BHD
    Inventors: Siong Hui Khoo, Lawrence Siau Tian Lim, Seek Ping Lee, Eng Long Ong, Norihide Enomoto
  • Publication number: 20130191964
    Abstract: A gloves formed from elastomer comprising 25-30 weight % of acrylonitrile, 62-71 weight % of butadiene and 4-8 weight % of unsaturated carboxylic acid (total 100 weight %), wherein crosslink is formed by a bond through at least a part of substituent which is possessed by said unsaturated carboxylic acid, and residual substituent of at least one part of substituent possessed by said unsaturated carboxylic acid is crosslinked by bivalent metal, said elastomer does not contain sulfur which is a crosslinking agent and sulfur composition which is a vulcanization accelerator, Mooney viscosity (ML(1+4)(100° C.)) of said elastomer crosslinked by a bond of at least one part of substituent possessing said unsaturated carboxyl group is 100-220, and thin film gloves prepared from said elastomer does not contain sulfur which is a crosslinking agent and sulfur composition which is a vulcanization accelerator, and thickness of the gloves is 0.05-0.
    Type: Application
    Filed: September 30, 2011
    Publication date: August 1, 2013
    Applicants: MIDORI ANZEN CO., LTD, KOSSAN SDN BHD
    Inventors: Siong Hui Khoo, Lawrence Siau Tian Lim, Seek Ping Lee, Eng Long Ong, Norihide Enomoto
  • Publication number: 20120246799
    Abstract: A composition for producing an elastomeric thin film comprising a carboxylated acrylonitrile polybutadiene latex which is vulcanized without the use of conventional sulphur and accelerators thereby reducing the possibility of contacting immediate Type I hypersensitivity and delay Type IV hypersensitivity caused by the presence of natural rubber latex proteins and accelerators respectively. The dipping process for making gloves by using a latex composition provided by: premixing carboxylated acrylonitrile polybutadiene latex with methacrylic acid, or alternatively using a self-crosslinked latex, adding zinc oxide, adjusted to 9 to 10 of the pH level, and diluted with water to obtain 18% to 30% by weight of total solid content; dipping the glove former into the composition to form a layer of thin film of the latex composition on the former; drying the thin latex film on the former and crosslinking the latex film on the former.
    Type: Application
    Filed: December 1, 2009
    Publication date: October 4, 2012
    Applicant: Koosan SDN BHD
    Inventors: Siong Hui Khoo, Lawrence Siau Tian Lim, Seek Ping Lee, Eng Long Ong