Patents by Inventor Cheong Wong

Cheong Wong 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).

  • Publication number: 20250115724
    Abstract: Disclosed is a method of coating an elastomeric article including providing an elastomeric article having a first polymer latex, and coating the elastomeric article with a coating composition having a latex dispersion, the latex dispersion having polyisoprene and a vulcanization composition having a source of sulfur, at least one fugitive dihydrocarbyl xanthogen polysulfide accelerator, at least one aldehyde-aniline condensate, and a metal oxide, and a second polymer latex selected from the group consisting of natural rubber, polyurethane, polybutadiene, polychloroprene, nitrile rubber, block copolymers of styrene and butadiene, block copolymers of styrene and isoprene, and synthetic polyisoprene, and water.
    Type: Application
    Filed: December 16, 2024
    Publication date: April 10, 2025
    Inventors: Seong Fong CHEN, Wei Cheong Wong
  • Patent number: 12215205
    Abstract: An elastomeric article having a rubber component comprising polyisoprene and an aldehyde aniline condensate, the elastomeric article having less than 1 ppm diisopropyl xanthogen polysulfide residue.
    Type: Grant
    Filed: September 5, 2023
    Date of Patent: February 4, 2025
    Assignee: Allegiance Corporation
    Inventors: Seong Fong Chen, Wei Cheong Wong
  • Publication number: 20240407427
    Abstract: An apparatus an related methods for recovering a substance from rejected delivery systems includes a transport system, a retainer, and a fluid conduit. The transport system is configured to receive a rejected delivery system and convey it along a conveyance path in a direction perpendicular to a longitudinal axis of a rejected delivery system. The transport system includes at least one transport member. The retainer includes an endless flexible belt configured to engage a rejected delivery system received on the transport system over a portion of the conveyance path as a rejected delivery system travels along the conveyance path and to retain a rejected delivery system on the transport system. The fluid conduit is configured to direct a jet of gas into a first end of a rejected delivery system from an opposite end of a rejected delivery system, whilst a rejected delivery system is transported along said portion of the conveyance path and retained on the transport system by the retainer.
    Type: Application
    Filed: September 30, 2022
    Publication date: December 12, 2024
    Inventors: Jeong Hwan PARK, Wong Kwee Cheong WONG, Jong Myung LEE, Sungduck KIM, Kyung Soo Jang JANG
  • Publication number: 20230416471
    Abstract: An elastomeric article having a rubber component comprising polyisoprene and an aldehyde aniline condensate, the elastomeric article having less than 1 ppm diisopropyl xanthogen polysulfide residue.
    Type: Application
    Filed: September 5, 2023
    Publication date: December 28, 2023
    Inventors: Seong Fong Chen, Wei Cheong Wong
  • Patent number: 11780972
    Abstract: An elastomeric article having a rubber component comprising polyisoprene and an aldehyde aniline condensate, the elastomeric article having less than 1 ppm diisopropyl xanthogen polysulfide residue.
    Type: Grant
    Filed: February 1, 2022
    Date of Patent: October 10, 2023
    Assignee: ALLEGIANCE CORPORATION
    Inventors: Seong Fong Chen, Wei Cheong Wong
  • Publication number: 20220251311
    Abstract: An elastomeric article having a rubber component comprising polyisoprene and an aldehyde aniline condensate, the elastomeric article having less than 1 ppm diisopropyl xanthogen polysulfide residue.
    Type: Application
    Filed: February 1, 2022
    Publication date: August 11, 2022
    Inventors: Seong Fong CHEN, Wei Cheong WONG
  • Patent number: 11242435
    Abstract: An elastomeric article having a rubber component comprising polyisoprene and an aldehyde aniline condensate, the elastomeric article having less than 1 ppm diisopropyl xanthogen polysulfide residue.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: February 8, 2022
    Assignee: ALLEGIANCE CORPORATION
    Inventors: Seong Fong Chen, Wei Cheong Wong
  • Publication number: 20200339767
    Abstract: An elastomeric article having a rubber component comprising polyisoprene and an aldehyde aniline condensate, the elastomeric article having less than 1 ppm diisopropyl xanthogen polysulfide residue.
    Type: Application
    Filed: July 9, 2020
    Publication date: October 29, 2020
    Inventors: Seong Fong CHEN, Wei Cheong WONG
  • Publication number: 20200299532
    Abstract: The present invention is directed to antistatic elastomeric articles and methods of making the same. The articles can be single layered or multilayered. The single layered articles possess desirable antistatic properties and desirable properties of comfort and feel. The multilayered articles have an outermost layer/surface that possesses desirable antistatic properties and an innermost layer/surface that exhibits desirable properties of comfort and feel. In preferred embodiments, the elastomeric articles are made form a nitrile/natural rubber blend. Articles of the present invention have antistatic properties measured as having a surface resistivity below about 1014 ?/sq and a static decay time of less than about 60 seconds.
    Type: Application
    Filed: June 5, 2020
    Publication date: September 24, 2020
    Inventors: Seong Fong CHEN, Wei Cheong WONG, Chii Yih LOW
  • Patent number: 10759913
    Abstract: This invention relates generally to vulcanization compounds and relates more specifically to vulcanization compositions with reduced allergenic potential that include accelerator compositions for vulcanizing elastomeric articles. Vulcanization compositions are disclosed that include a single fugitive dihydrocarbyl xanthogen polysulfide accelerator and a single aldehyde-aniline condensate accelerator.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: September 1, 2020
    Assignee: Allegiance Corporation
    Inventors: Seong Fong Chen, Wei Cheong Wong
  • Patent number: 10752738
    Abstract: An aqueous elastomer dispersion includes a dispersed phase and an aqueous phase. The dispersed phase includes an elastomer including curable aliphatic conjugated-diene elastomers, such as polyisoprene, and a minor amount of at least one additive. The aqueous phase includes water and other optional components in either a soluble state or a dispersion state. The aqueous elastomer dispersion may be prepared by dissolving an elastomer, such as rubber, and additives in a solvent mixture and then converting the resulting solution into an aqueous emulsion. The aqueous emulsion is concentrated and the solvent is stripped from it to yield a dilute latex. The dilute latex that is obtained is concentrated again. Articles made from the aqueous elastomer dispersion include medical gloves, condoms, probe covers, dental dams, finger cots, catheters and the like.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: August 25, 2020
    Assignee: ALLEGIANCE CORPORATION
    Inventors: Shiping Wang, Seong Fong Chen, Ida Berger, Yun-Siung Tony Yeh, Wei Cheong Wong
  • Patent number: 10752798
    Abstract: The present invention is directed to antistatic elastomeric articles and methods of making the same. The articles can be single layered or multilayered. The single layered articles possess desirable antistatic properties and desirable properties of comfort and feel. The multilayered articles have an outermost layer/surface that possesses desirable antistatic properties and an innermost layer/surface that exhibits desirable properties of comfort and feel. In preferred embodiments, the elastomeric articles are made form a nitrile/natural rubber blend. Articles of the present invention have antistatic properties measured as having a surface resistivity below about 1014 ?/sq and a static decay time of less than about 60 seconds.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: August 25, 2020
    Assignee: Allegiance Corporation
    Inventors: Seong Fong Chen, Wei Cheong Wong, Chii Yih Low
  • Publication number: 20200206392
    Abstract: The invention described herein relates to a therapeutic, moisturizing coating composition for elastomeric articles which is applied directly onto the skin-contacting surface of the article as part of the manufacturing process. The coating composition is thermally stable and subsequently hydrates when contacted with a moisturized skin surface to convert into a liquid “lotion” form during wearing of the article. The coating composition provides therapeutic benefits to the wearer's skin as a result of wearing the article, such as improved skin moisturization, softness of feel, improved skin elasticity and firmness, and reduced redness and irritation. The invention is particularly useful in medical gloves, including examination and surgical gloves.
    Type: Application
    Filed: January 24, 2020
    Publication date: July 2, 2020
    Inventors: Shiping WANG, Yun-Siung Tony YEH, James OWENS, Wei Cheong WONG
  • Patent number: 10662347
    Abstract: Methods for preparing copolymeric emulsions from at least one water soluble monomer and at least one water insoluble monomer are disclosed herein. In some embodiments, one or more surfactants and stabilizers may be used. In some embodiments, the monomers used in the process include, by total monomer weight, at least 50% water soluble monomers and at least 10% water insoluble monomers. Copolymer emulsions formed from the reaction product of at least one water soluble monomer and at least one water insoluble monomer are also disclosed along with articles coated with such emulsions and coating formulations made from such emulsions as well as methods for the manufacture and coating of such articles.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: May 26, 2020
    Assignee: ALLEGIANCE CORPORTATION
    Inventors: Daniel L. Holguin, Andre Mayer, Suo Phong Lee, Michael Meyers, Dennis Kopp, Wei Cheong Wong, Chii Yih Low, Shiping Wang, Xiaochuan Hu, Chuang Sim Chong
  • Patent number: 10517338
    Abstract: This invention relates to an elastomeric article with improved lubricity and donnablity and reduced stickiness/tackiness. According to the methods of the invention, the internal surface of the elastomeric article is coated with a polyisoprene coating. The coating of the invention is formed from synthetic polyisoprene rubber that may or may not contain minor amounts of other components. The coating is preferably directly bonded to the underlying elastomeric article.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: December 31, 2019
    Assignee: ALLEGIANCE CORPORATION
    Inventors: Seong Fong Chen, Shiping Wang, Wei Cheong Wong, Chuang Sim Chong
  • Patent number: 10472110
    Abstract: The present invention relates generally to methods of sterilizing elastomeric articles in a manner that prevents and/or reduces degradation to the articles, particularly degradation that may be caused and/or accelerated by sterilization techniques such as gamma irradiation, x-ray irradiation, and electron-beam processing. The methods include packaging the elastomeric articles in order to improve their resistance to degradation. In certain aspects of the invention, packaged elastomeric articles, optionally containing one or more antidegradants, such as antioxidant and/or antiozonant compounds, are also provided. The methods of providing degradation-resistant elastomeric articles in accordance with the present invention may also be used to reduce the occurrence of cracking and discoloration in elastomeric articles, regardless of whether they are subjected to sterilization.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: November 12, 2019
    Assignee: ALLEGIANCE CORPORATION
    Inventors: Seong Fong Chen, Wei Cheong Wong
  • Patent number: D1002026
    Type: Grant
    Filed: March 14, 2022
    Date of Patent: October 17, 2023
    Assignee: Ramblin' Brands Pte Ltd.
    Inventor: Jeremy Siao Lioung Ng Cheong Wong
  • Patent number: D1029282
    Type: Grant
    Filed: May 12, 2022
    Date of Patent: May 28, 2024
    Assignee: Ramblin' Brands Pte Ltd.
    Inventor: Jeremy Siao Lioung Ng Cheong Wong
  • Patent number: D1035027
    Type: Grant
    Filed: May 12, 2022
    Date of Patent: July 9, 2024
    Assignee: Ramblin' Brands Pte Ltd.
    Inventor: Jeremy Siao Lioung Ng Cheong Wong
  • Patent number: D1042869
    Type: Grant
    Filed: February 22, 2023
    Date of Patent: September 17, 2024
    Assignee: Ramblin' Brands Pte Ltd.
    Inventor: Jeremy Siao Lioung Ng Cheong Wong