Patents Assigned to Hydron Limited
  • Process for the preparation of a diol
    Patent number: 6610895
    Abstract: There is provided a process for the preparation of a polymerisable monomer of formula (I) comprising contacting a compound of formula (II) with an acid such as an immobilised acid.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: August 26, 2003
    Assignee: Hydron Limited
    Inventors: Barry Charles Holdstock, Trevor Owen Glasey
  • Balanced charge polymer and hydrophilic contact lens manufactured therefrom
    Patent number: 5391669
    Abstract: A water swellable crosslinked polymer of essentially balanced charge is obtained by polymerizing a polymer-forming composition comprising a cationic-anionic pair of ethylenically unsaturated monomers and a non-ionic ethylenically unsaturated hydrophilic and/or hydrophobic monomer. Contact lenses formed from the polymer exhibit little if any tendency to attract soils, e.g., proteinaceous debris, to their surfaces.
    Type: Grant
    Filed: November 9, 1993
    Date of Patent: February 21, 1995
    Assignees: Hydron Limited, Ceskoslovenska akademie ved.
    Inventors: Jiri Sulc, Zuzana Krcova, Patrick Chen, Qi-Bin Bao
  • Containers
    Patent number: D431720
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: October 10, 2000
    Assignee: Hydron Limited
    Inventor: Sean Patrick Fortune