Patents by Inventor Koralalage Don Sugathananda Amarasekera

Koralalage Don Sugathananda Amarasekera 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).

  • Compositions for synthetic polyisoprene latex articles
    Patent number: 11845817
    Abstract: The present disclosure relates to synthetic polyisoprene elastomeric articles including: one or more cured blend compositions of pre-vulcanized synthetic polyisoprene particles and non-prevulcanized synthetic polyisoprene particles, wherein the pre-vulcanized synthetic polyisoprene particles and the non-prevulcanized synthetic polyisoprene particles are bonded by mono-sulfidic and/or di-sulfidic, and poly-sulfidic crosslinks, wherein the poly-sulfidic crosslinks are present in an amount of 60 to 79 percent of the total amount of crosslinks in the cured blend composition. Methods of making synthetic polyisoprene elastomeric articles such as gloves or condoms is also disclosed.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: December 19, 2023
    Assignee: Ansell Limited
    Inventors: Koralalage Don Sugathananda Amarasekera, David M. Lucas, Angodage Sujith Ruwan Samantha Perera, Dambadeni Arachchige Ruwani Upekshika Lalanthani
  • Aligned gloves
    Patent number: 11564762
    Abstract: A glove-in-glove having aligned features is disclosed.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: January 31, 2023
    Assignee: Ansell Limited
    Inventors: Lakshmie Swarnamala Ranasinghe, Sakala Walli Acharige Samantha Pradeep Laksiri, Koralalage Don Sugathananda Amarasekera
  • ALIGNED GLOVES
    Publication number: 20210137625
    Abstract: A glove-in-glove having aligned features is disclosed.
    Type: Application
    Filed: May 22, 2018
    Publication date: May 13, 2021
    Inventors: Lakshmie Swarnamala Ranasingue, Sakala Walli Acharige Samantha Pradeep Laksiri, Koralalage Don Sugathananda Amarasekera
  • COMPOSITIONS FOR SYNTHETIC POLYISOPRENE LATEX ARTICLES
    Publication number: 20210115172
    Abstract: The present disclosure relates to synthetic polyisoprene elastomeric articles including: one or more cured blend compositions of pre-vulcanized synthetic polyisoprene particles and non-prevulcanized synthetic polyisoprene particles, wherein the pre-vulcanized synthetic polyisoprene particles and the non-prevulcanized synthetic polyisoprene particles are bonded by mono-sulfidic and/or di-sulfidic, and poly-sulfidic crosslinks, wherein the poly-sulfidic crosslinks are present in an amount of 60 to 79 percent of the total amount of crosslinks in the cured blend composition. Methods of making synthetic polyisoprene elastomeric articles such as gloves or condoms is also disclosed.
    Type: Application
    Filed: March 8, 2019
    Publication date: April 22, 2021
    Inventors: Koralalage Don Sugathananda Amarasekera, David M. Lucas, Angodage Sujith Ruwan Samantha Perera, Dambadeni Arachchige Ruwani Upekshika Lalanthani
  • POLYMERIC COMPOSITIONS COMPRISING POLYISOPRENE
    Publication number: 20150128329
    Abstract: A glove, including a polymeric, elastomeric, or latex composition, having a water-based emulsion of a polyisoprene polymer; a first accelerator comprising at least one of a thiourea, a benzothiazole sulphenamide, a thiazole, or a dialkyl dithiocarbamate, or combinations thereof, a second accelerator comprising a thiuram or a xanthogen, or a combination thereof, at least one anti-oxidant, at least one vulcanizing agent; and an activator, wherein a total amount of the first accelerator and the second accelerator ranges from 0.2 to 2.5 PHR of the polymeric, elastomeric, or latex composition and the polymeric, elastomeric, or latex composition is substantially free of diphenyl guanidine and/or casein.
    Type: Application
    Filed: November 12, 2014
    Publication date: May 14, 2015
    Inventors: Koralalage Don Sugathananda Amarasekera, David M. Lucas, Dambadeni Arachchige Ruwani Upekshika Lalanthani