Patents Assigned to T. R. Developments, Ltd.
  • Hydrogel-forming polymers used in intraocular lenses
    Patent number: 5135965
    Abstract: Hydrogel-forming polymers for contact lenses and intraocular lenses having increased toughness despite high equilibrium water content comprise a hydrophilic monomer (e.g. an N-vinyl lactam) and a polyunsaturated polymeric cross-linking agent. UV-absorbers are also disclosed which are bound in the polymer structure so as to be inextractable, some undergoing photo-Fries re-arrangement on exposure to UV-radiation so as to become UV-absorbers in the re-arranged form.
    Type: Grant
    Filed: September 15, 1988
    Date of Patent: August 4, 1992
    Assignee: T. R. Developments, Ltd.
    Inventor: Menashe Tahan