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).

  • Publication number: 20080143956
    Abstract: At least one of the surfaces of a silicone contact lens is a wrinkled surface, providing the contact lens surface with a desired topography. The wrinkled surface may include random ridges, either over the entire surface of the lens, or in a desired pattern on the surface of the lens.
    Type: Application
    Filed: December 15, 2006
    Publication date: June 19, 2008
    Applicant: BAUSCH & LOMB INCORPORATED
    Inventors: Ravi Sharma, Robert M. Braun, Daniel M. Ammon, Jay F. Kunzler, Yu-Chin Lai
  • Publication number: 20080128930
    Abstract: A method of making a contact lens involves adding a lens-forming mixture to a contact lens mold, copolymerizing the lens-forming monomers to form a contact lens, releasing the contact lens from the mold; and removing the polymeric material from the contact lens. The polymeric material is not reactive with the lens-forming monomers, but is included in the lens-forming monomer mixture to facilitate releasing the contact lens from the mold.
    Type: Application
    Filed: November 20, 2007
    Publication date: June 5, 2008
    Inventors: Yu-Chin Lai, Gary D. Friends, Mary Lou Friends
  • Publication number: 20080097002
    Abstract: Provided are a novel class of fumaric- and itaconic-containing prepolymers and compositions comprising the prepolymers used in the manufacture of medical devices.
    Type: Application
    Filed: December 13, 2007
    Publication date: April 24, 2008
    Inventors: Yu-Chin Lai, Edmond Quinn
  • Patent number: 7344731
    Abstract: A copolymer useful as a rigid gas permeable contact lens material is the polymerization product of a monomeric mixture comprising a polysiloxane-containing urethane or urea prepolymer endcapped with polymerizable ethylenically unsaturated radicals.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: March 18, 2008
    Assignee: Bausch & Lomb Incorporated
    Inventors: Yu-Chin Lai, James A. Bonafini, Jr.
  • Publication number: 20080004410
    Abstract: A macromonomer comprises an ?,?-conjugated terminal carboxylic group and a plurality of hydrophilic groups. Polymeric materials comprise such a macromonomer are used advantageously to provide a hydrophilic or lubricious (or both) coating on medical devices. Such polymeric materials can comprise units of other hydrophilic monomers.
    Type: Application
    Filed: June 30, 2006
    Publication date: January 3, 2008
    Inventors: Yu-Chin Lai, Weihong Lang
  • Publication number: 20080003259
    Abstract: A medical device having an increased surface hydrophilicity comprises a coating polymer comprising units of a polymerizable hydrophilic compound that is attached to the surface of the medical device via the Michael addition reaction. The coating polymer can be applied to a medical device comprising a hydrogel material. The attachment of the coating polymer may be enhanced by increasing the population of the medical-device surface functional groups before contacting the medical device with the coating polymer.
    Type: Application
    Filed: June 30, 2006
    Publication date: January 3, 2008
    Inventors: Joseph C. Salamone, Yu-Chin Lai, Weihong Lang, Wenyan Yan
  • Publication number: 20080003252
    Abstract: A macromonomer of the present invention comprises at least functional group and a plurality of hydrophilic moieties. Such a functional group can be an ethylenically unsaturated group that comprises acrylate, methacrylate, sinapate (or 3,5-dimethoxy-4-hydroxycinnamate), cinnamate (or 3-phenylacrylate), senecioate (or 3,3-dimethylacrylate), crotonate, maleate, fumarate, itaconate, vinyl, allyl, or styryl group. Polymeric materials comprise such a macromonomer are used advantageously to provide a hydrophilic or lubricious (or both) coating on polymeric articles, such as medical devices. Such polymeric materials can comprise units of other hydrophilic monomers.
    Type: Application
    Filed: June 30, 2006
    Publication date: January 3, 2008
    Inventors: Yu-Chin Lai, Weihong Lang
  • Patent number: 7304117
    Abstract: Novel azo-based reactive yellow dyes and a process for manufacturing and using ocular devices having blue light absorption properties. Intraocular lenses so produced block blue light from reaching the retina of an eye implanted with the IOL. By blocking blue light from reaching the retina, the IOL thereby prevents potential damage to the retina.
    Type: Grant
    Filed: June 21, 2006
    Date of Patent: December 4, 2007
    Assignee: Bausch & Lomb Incorporated
    Inventor: Yu-Chin Lai
  • Publication number: 20070264509
    Abstract: A copolymer comprising monomeric units of one or more polymerizable polyalcohols selected from the groups consisting of erythritol, xylitol, sorbitol and mixtures thereof; and one or more polymerizable carboxylic acids.
    Type: Application
    Filed: February 20, 2007
    Publication date: November 15, 2007
    Inventors: Yu-Chin Lai, Weihong Lang, Wenyan Yan
  • Publication number: 20070264503
    Abstract: A medical device having an increased surface hydrophilicity comprises a coating polymer comprising units of a polymerizable hydrophilic compound, such as a polymerizable polyhydric alcohol. The coating polymer can be applied to a medical device comprising a hydrogel material. The medical device can have a reduced dehydration rate compared to a device that is devoid of such a coating polymer and/or provide increased comfort to a user.
    Type: Application
    Filed: May 11, 2006
    Publication date: November 15, 2007
    Inventors: Yu-Chin Lai, Weihong Lang, Wenyan Yan
  • Patent number: 7279538
    Abstract: A polysiloxane comprises diaryl, dialkyl, and arylalkyl siloxane units, and further has at least a functional group. Such polysiloxane can be further copolymerized with an additional monomer to produce polymeric compositions suitable for making ophthalmic devices. The additional monomer can be selected to produce desirable properties for ophthalmic applications, such as high refractive index and/or high elongation.
    Type: Grant
    Filed: April 1, 2005
    Date of Patent: October 9, 2007
    Assignee: Bausch & Lomb Incorporated
    Inventors: Yu-Chin Lai, Edmond T. Quinn
  • Patent number: 7276544
    Abstract: A process for producing intraocular lenses (IOLs) capable of absorbing blue light and ultraviolet light using photo curing. Intraocular lenses so produced block blue light and ultraviolet light from reaching the retina of an eye implanted with the IOL. By blocking blue light and ultraviolet light from reaching the retina, the IOL thereby prevents potential damage to the retina.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: October 2, 2007
    Assignee: Bausch & Lomb Incorporated
    Inventors: Yu-Chin Lai, Dominic V. Ruscio, George F. Green
  • Patent number: 7241312
    Abstract: A process for producing silicone intraocular lenses (IOLs) capable of absorbing blue light. Intraocular lenses so produced block blue light from reaching the retina of an eye implanted with the IOL. By blocking blue light from reaching the retina, the IOL thereby prevents potential damage to the retina.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: July 10, 2007
    Assignee: Bausch & Lomb Incorporated
    Inventors: Yu-Chin Lai, Dominic V. Ruscio
  • Publication number: 20070138668
    Abstract: A process for removing extractables from biomedical devices, particularly ophthalmic biomedical devices, involves contacting the device with a mixture of first and second extractants. The first extractant is an organic compound having a flash point above 38° C., and the second extractant is an organic compound having a flash point below 38° C.
    Type: Application
    Filed: December 12, 2006
    Publication date: June 21, 2007
    Inventors: Yu-Chin Lai, Edmond Quinn, Alan Wilson
  • Publication number: 20070138669
    Abstract: A process for producing polymeric biomedical devices, such as contact lenses, involves casting a monomeric mixture including a diluent; and subsequently removing extractables from the devices by contacting the devices with the an additional volume of the diluent.
    Type: Application
    Filed: December 15, 2006
    Publication date: June 21, 2007
    Inventors: Yu-Chin Lai, Edmond Quinn, Alan Wilson
  • Publication number: 20070129521
    Abstract: Provided are novel reactive functionalized fumaric- and itaconic-containing prepolymers and compositions comprising the prepolymers used in the manufacture of medical devices. The prepolymers can be used to provide surface modified contact lenses formed from one or more fumaric- or itaconic-containing prepolymers having reactive functionality that is complimentary to reactive, hydrophilic polymers.
    Type: Application
    Filed: December 26, 2006
    Publication date: June 7, 2007
    Inventors: Yu-Chin Lai, Edmond Quinn
  • Publication number: 20070092831
    Abstract: A radiation-absorbing polymeric material comprises units of a polymerizable UV-absorbing compound, a violet light-absorbing compound, and a monomer, and is capable of absorbing UV radiation, at least about 90 percent of light having wavelength of 425 nm, less than about 50 percent of light having wavelength of 450 nm, and less than about 30 percent of light having wavelength of 475 nm. Ophthalmic devices, such as contact lenses, corneal rings, corneal inlays, keratoprostheses, and intraocular lenses, are made from such polymeric material.
    Type: Application
    Filed: October 24, 2005
    Publication date: April 26, 2007
    Inventors: Yu-Chin Lai, Edmond Quinn
  • Publication number: 20070092830
    Abstract: A polymeric radiation-absorbing material comprises units of a polymerizable benzotriazole-based radiation-absorbing compound and a monomer, and is capable of absorbing UV radiation, at least about 90 percent of light having wavelength of 425 nm, less than about 50 percent of light having wavelength of 450 nm, and less than about 30 percent of light having wavelength of 475 nm. Ophthalmic devices, such as contact lenses, corneal rings, corneal inlays, keratoprostheses, and intraocular lenses, are made from such polymeric material.
    Type: Application
    Filed: October 24, 2005
    Publication date: April 26, 2007
    Inventors: Yu-Chin Lai, Edmond Quinn
  • Patent number: 7198639
    Abstract: Soft, durable, polymeric compositions with one or more reactive polyhedral oligomeric silsesquioxane reinforcing agents and ophthalmic devices such as for example intraocular lenses and corneal inlays made therefrom are described herein.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: April 3, 2007
    Assignee: Bausch & Lomb Incorporated
    Inventors: Yu-Chin Lai, James A. Bonafini, Jr.
  • Patent number: 7176268
    Abstract: Provided are novel reactive functionalized fumaric- and itaconic-containing prepolymers and compositions comprising the prepolymers used in the manufacture of medical devices. The prepolymers can be used to provide surface modified contact lenses formed from one or more fumaric- or itaconic-containing prepolymers having reactive functionality that is complimentary to reactive, hydrophilic polymers.
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: February 13, 2007
    Assignee: Bausch & Lomb Incorporated
    Inventors: Yu-Chin Lai, Edmond T. Quinn