Patents by Inventor Seong Fong Chen

Seong Fong Chen 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: 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
  • 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
  • Publication number: 20190292331
    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: Application
    Filed: December 20, 2018
    Publication date: September 26, 2019
    Applicant: ALLEGIANCE CORPORATION
    Inventors: SHIPING WANG, SEONG FONG CHEN, IDA BERGER, YUN-SIUNG TONY YEH, WEI CHEONG WONG
  • Patent number: 10421569
    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: September 24, 2019
    Assignee: Allegiance Corporation
    Inventors: Seong Fong Chen, Wei Cheong Wong
  • Publication number: 20190177496
    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: Application
    Filed: December 11, 2018
    Publication date: June 13, 2019
    Inventors: Seong Fong Chen, Wei Cheong Wong
  • Patent number: 10125239
    Abstract: The present invention generally relates to vulcanization compositions used to vulcanize elastomeric articles, where the vulcanization compositions have reduced allergenic potential as compared to elastomeric articles formed using vulcanization compositions having non-fugitive accelerators. The present invention also relates to elastomeric articles formed using the vulcanization compositions. The invention further relates to methods for making a reduced-allergenicity vulcanization composition, and to methods for using the vulcanization compositions to vulcanize elastomeric articles.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: November 13, 2018
    Assignee: ALLEGIANCE CORPORATION
    Inventors: Seong Fong Chen, Wei Cheong Wong, Chii Yih Low
  • Publication number: 20170145185
    Abstract: The present invention generally relates to vulcanization compositions used to vulcanize elastomeric articles, where the vulcanization compositions have reduced allergenic potential as compared to elastomeric articles formed using vulcanization compositions having non-fugitive accelerators. The present invention also relates to elastomeric articles formed using the vulcanization compositions. The invention further relates to methods for making a reduced-allergenicity vulcanization composition, and to methods for using the vulcanization compositions to vulcanize elastomeric articles.
    Type: Application
    Filed: December 12, 2016
    Publication date: May 25, 2017
    Applicant: ALLEGIANCE CORPORATION
    Inventors: SEONG FONG CHEN, WEI CHEONG WONG, CHI YIH LOW
  • Publication number: 20170130018
    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: Application
    Filed: January 19, 2017
    Publication date: May 11, 2017
    Applicant: ALLEGIANCE CORPORATION
    Inventors: SEONG FONG CHEN, SHIPING WANG, WEI CHEONG WONG, CHUANG SIM CHONG
  • Patent number: 9579426
    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: June 4, 2015
    Date of Patent: February 28, 2017
    Assignee: ALLEGIANCE CORPORATION
    Inventors: Seong Fong Chen, Shiping Wang, Wei Cheong Wong, Chuang Sim Chong
  • Patent number: 9550906
    Abstract: The present invention generally relates to vulcanization compositions used to vulcanize elastomeric articles, where the vulcanization compositions have reduced allergenic potential as compared to elastomeric articles formed using vulcanization compositions having non-fugitive accelerators. The present invention also relates to elastomeric articles formed using the vulcanization compositions. The invention further relates to methods for making a reduced-allergenicity vulcanization composition, and to methods for using the vulcanization compositions to vulcanize elastomeric articles.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: January 24, 2017
    Assignee: Allegiance Corporation
    Inventors: Seong Fong Chen, Wei Cheong Wong, Chii Yih Low
  • Publication number: 20160355288
    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: Application
    Filed: June 3, 2016
    Publication date: December 8, 2016
    Applicant: Allegiance Corporation
    Inventors: SEONG FONG CHEN, WEI CHEONG WONG