Patents by Inventor Yu-Chin Lai

Yu-Chin Lai 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).

  • Polybutadiene-based compositions for contact lenses
    Patent number: 5708094
    Abstract: Contact lenses are made from the polymerization product of a monomer mixture comprising a polybutadiene-based compound as represented by formula (I)E--B(AB).sub.a --E (I)wherein:A is selected from the group consisting of a chemical bond, --OCO--, --COO--, --CONH--, --NHCO--, --OCOO--, --NHCOO-- and --OCONH--,a is zero or an integer of at least 1;each B is independently represented by the formula (II) ##STR1## where each of m, n, and p is independently 0 or greater, provided that m+n+p is at least 10;R is hydrogen or C.sub.1 -C.sub.4 alkyl;each E is independently a polymerizable terminal ethylenically unsaturated organic group.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: January 13, 1998
    Assignee: Bausch & Lomb Incorporated
    Inventors: Yu-Chin Lai, Ronald E. Bambury
  • Urea and urethane monomers for contact lens materials
    Patent number: 5648515
    Abstract: Urea- and urethane-containing monomers for contact lens materials are disclosed.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: July 15, 1997
    Assignee: Bausch & Lomb Incorporated
    Inventor: Yu-Chin Lai
  • Urea and urethane monomers for contact lens materials
    Patent number: 5639908
    Abstract: Urea- and urethane-containing monomers for contact lens materials are disclosed.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: June 17, 1997
    Assignee: Bausch & Lomb Incorporated
    Inventor: Yu-Chin Lai
  • Method of curing methacrylate-based compositions
    Patent number: 5610204
    Abstract: A method of improving the polymerization rate and physical properties of a polymerizable methacrylate-containing hydrogel composition by decreasing the time required to achieve the polymerization peak time.
    Type: Grant
    Filed: May 23, 1996
    Date of Patent: March 11, 1997
    Assignee: Bausch & Lomb Incorporated
    Inventor: Yu-Chin Lai
  • Urea and urethane monomers for contact lens materials
    Patent number: 5594085
    Abstract: Urea and urethane-containing monomers for contact lens materials are disclosed.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: January 14, 1997
    Assignee: Bausch & Lomb Incorporated
    Inventor: Yu-Chin Lai
  • UV curable crosslinking agents useful in copolymerization
    Patent number: 5512205
    Abstract: A novel class of compounds are disclosed which may be used as novel crosslinking agents for acrylic-containing, vinyl-containing and/or styrene-containing hydrophilic monomers to prepare novel UV-curable hydrophilic copolymers suitable for use as biomedical articles, especially contact lenses.
    Type: Grant
    Filed: May 9, 1994
    Date of Patent: April 30, 1996
    Assignee: Bausch & Lomb Incorporated
    Inventor: Yu-Chin Lai
  • Fumarate and fumaramide siloxane hydrogel compositions
    Patent number: 5496871
    Abstract: Novel fumarate- and fumaramide-containing monomers are disclosed which are especially useful in the preparation of biocompatible devices, especially contact lenses.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: March 5, 1996
    Assignee: Bausch & Lomb Incorporated
    Inventors: Yu-Chin Lai, Ronald E. Bambury
  • Wettable silicone hydrogel compositions and methods for their manufacture
    Patent number: 5486579
    Abstract: Improved silicone-containing hydrogels are disclosed with enhanced wettability comprising a silicone-containing monomer, at least one acrylic-containing hydrophilic monomer, and at least one vinyl-containing hydrophilic monomer.
    Type: Grant
    Filed: April 11, 1994
    Date of Patent: January 23, 1996
    Assignee: Bausch & Lomb Incorporated
    Inventors: Yu-Chin Lai, Paul L. Valint, Jr.
  • Urea and urethane monomers for contact lens materials
    Patent number: 5451651
    Abstract: Urea- and urethane-containing monomers for contact lens materials are disclosed.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: September 19, 1995
    Assignee: Bausch & Lomb Incorporated
    Inventor: Yu-Chin Lai
  • UV curable crosslinking agents useful in copolymerization
    Patent number: 5449729
    Abstract: A novel class of compounds are disclosed which may be used as novel crosslinking agents for acrylic-containing, vinyl-containing and/or styrene-containing hydrophilic monomers to prepare novel UV-curable hydrophilic copolymers suitable for use as biomedical articles, especially contact lenses.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: September 12, 1995
    Assignee: Bausch & Lomb Incorporated
    Inventor: Yu-Chin Lai
  • Fumaramide siloxane hydrogel compositions
    Patent number: 5420324
    Abstract: Fumaramide-containing monomers are disclosed which are especially useful in the preparation of biocompatible devices, especially contact lenses.
    Type: Grant
    Filed: August 24, 1994
    Date of Patent: May 30, 1995
    Assignee: Bausch & Lomb Incorporated
    Inventors: Yu-Chin Lai, Ronald E. Bambury
  • Surface wettable silicone hydrogels
    Patent number: 5387632
    Abstract: A novel silicone-containing, hydrogel material is disclosed comprising an acrylic-capped polysiloxane prepolymer, polymerized with a bulky polysiloxanylalkyl (meth)acrylate monomer and at least one hydrophilic monomer.
    Type: Grant
    Filed: August 3, 1994
    Date of Patent: February 7, 1995
    Assignee: Bausch & Lomb Incorporated
    Inventors: Yu-Chin Lai, Dominic V. Ruscio, Paul L. Valint, Jr.
  • Fumarate and fumaramide siloxane hydrogel compositions
    Patent number: 5374662
    Abstract: Novel fumarate- and fumaramide-containing monomers are disclosed which are especially useful in the preparation of biocompatible devices, especially contact lenses.
    Type: Grant
    Filed: March 15, 1993
    Date of Patent: December 20, 1994
    Assignee: Bausch & Lomb Incorporated
    Inventors: Yu-Chin Lai, Ronald E. Bambury
  • Surface modification of polymer objects
    Patent number: 5364918
    Abstract: A method of modifying the surfaces of the polymeric objects by adding a polymerizable surfactant to the monomer mix used to form the object. Also disclosed are surface-modified objects prepared by this method, which is particularly suited for modifying the surfaces of contact lenses.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: November 15, 1994
    Assignee: Bausch & Lomb Incorporated
    Inventors: Paul L. Valint, Jr., Joseph A. McGee, Yu-Chin Lai
  • Surface wettable silicone hydrogels
    Patent number: 5358995
    Abstract: A novel silicone-containing, hydrogel material is disclosed comprising an acrylic-capped polysiloxane prepolymer, polymerized with a bulky polysiloxanylalkyl (meth)acrylate monomer and at least one hydrophilic monomer.
    Type: Grant
    Filed: May 15, 1992
    Date of Patent: October 25, 1994
    Assignee: Bausch & Lomb Incorporated
    Inventors: Yu-Chin Lai, Dominic V. Ruscio, Paul L. Valint, Jr.
  • Wettable silicone hydrogel compositions and methods for their manufacture
    Patent number: 5352714
    Abstract: Improved silicone-containing hydrogels are disclosed with enhanced wettability comprising a silicone-containing monomer, hydrophilic monomers, and a relatively non-polar ring-containing monomer able to be converted to a highly polar amino acid upon hydration.
    Type: Grant
    Filed: July 30, 1992
    Date of Patent: October 4, 1994
    Assignee: Bausch & Lomb Incorporated
    Inventors: Yu-Chin Lai, Gary D. Friends, Paul L. Valint, Jr.
  • UV curable crosslinking agents useful in copolymerization
    Patent number: 5310779
    Abstract: A novel class of compounds are disclosed which may be used as novel crosslinking agents for acrylic-containing, vinyl-containing and/or styrene-containing hydrophilic monomers to prepare novel UV-curable hydrophilic copolymers suitable for use as biomedical articles, especially contact lenses.
    Type: Grant
    Filed: July 30, 1992
    Date of Patent: May 10, 1994
    Assignee: Bausch & Lomb Incorporated
    Inventor: Yu-Chin Lai
  • Mold materials for silicone containing lens materials
    Patent number: 5274008
    Abstract: When molding shaped articles such as contact lenses from monomeric mixtures containing silicone monomers and hydrophilic monomers, the wettability of the resulting article is improved by using a mold material produced from a resin comprising a copolymer of an alpha, beta, olefinically unsaturated mononitrile and at least one comonomer to enhance melt processability.
    Type: Grant
    Filed: January 14, 1993
    Date of Patent: December 28, 1993
    Assignee: Bausch & Lomb Incorporated
    Inventor: Yu-Chin Lai
  • Process for making silicone containing hydrogel lenses
    Patent number: 5260000
    Abstract: A process for preparing silicone hydrogel contact lenses where machining operations are employed to produce a lens having a desired final shape. The silicone hydrogel contact lenses are prepared by:providing a monomeric mixture comprising a silicone-containing monomer, a hydrophilic monomer and an organic diluent;charging the mixture to a mold and curing the formulation in the mold to obtain a shaped article;removing organic diluent from the shaped article to improve machineability of the article; andmachining the shaped article to obtain a contact lens having a desired configuration.
    Type: Grant
    Filed: August 3, 1992
    Date of Patent: November 9, 1993
    Assignee: Bausch & Lomb Incorporated
    Inventors: Mahendra P. Nandu, Rajan S. Bawa, Yu-Chin Lai
  • Surface modification of polymer objects
    Patent number: 5219965
    Abstract: A method of modifying the surfaces of polymeric objects by adding a polymerizable surfactant to the monomer mix used to form the object. Also disclosed are surface-modified objects prepared by this method, which is particularly suited for modifying the surfaces of contact lenses.
    Type: Grant
    Filed: November 27, 1990
    Date of Patent: June 15, 1993
    Assignee: Bausch & Lomb Incorporated
    Inventors: Paul L. Valint, Jr., Joseph A. McGee, Yu-Chin Lai