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公开(公告)号：US20200376787A1
公开(公告)日：2020-12-03
申请号：US16884512
申请日：2020-05-27
Applicant: Alcon Inc.
Inventor： Steve Yun Zhang , Changhong Yin , Richard Charles Breitkopf
Abstract: The invention provides a thermal cast-molding method for producing colored silicone hydrogel contact lenses. The method of the invention comprises: (1) forming, on a molding surface of a mold, a transferable colored polymeric composite film which comprises or consists essentially of a first polymeric film, a second polymeric film and a cured colored image encapsulated therewithin; (2) dispensing a silicone hydrogel lens formulation into the lens-forming cavity of the mold; and (4) thermally curing the third polymerizable composition within the lens-forming cavity for at least about 40 minutes to form the colored silicone hydrogel contact lens, whereby the transferable, colored, and polymeric composite film detaches from the first or second molding surface and becomes integral with the body of the silicone hydrogel contact lens.
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公开(公告)号：US20190300654A1
公开(公告)日：2019-10-03
申请号：US16365973
申请日：2019-03-27
Applicant: Alcon Inc.
Inventor： Daqing Wu , Steve Yun Zhang , Junhao Ge , Richard Charles Breitkopf , Augustine Twum Kumi , Weihong Lang
IPC: C08G77/442 , G02B1/04 , B29D11/00
Abstract: The invention provides a method for making silicone hydrogel contact lenses. The method of the invention is characterized by using an organic solvent as a processing-aid tool for controlling lens diameter without significantly affecting lens equilibrium water content during cast-molding of soft contact lenses from a polymerizable composition. By adjusting the weight percentage of the organic solvent in a polymerizable composition for making SiHy contact lenses, one can adjust lens diameter of produced SiHy lenses to meet target without affecting adversely the lens properties.
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公开(公告)号：US20240399686A1
公开(公告)日：2024-12-05
申请号：US18678966
申请日：2024-05-30
Applicant: Alcon Inc.
Inventor： Zahra Bassampour , Steve Yun Zhang , Lilanni Perez , Ashanti Smith , Nicholas Gober , Ya-Wen Chang , Newton T. Samuel , Richard Charles Breitkopf
IPC: B29D11/00 , B29K23/00 , B29K83/00 , B29K105/00 , B29K105/20 , G02C7/04
Abstract: The invention provides a method for producing delamination-resistant embedded contact lenses involving use of a mold set in two-curing steps and a special lens-forming composition for forming a bulk hydrogel material for embedding a crosslinked polymeric insert. The mold set consists of three mold halves, one of which is used twice, the first time for molding an insert from an insert-forming composition and the second time for an embedded contact lens with the molded insert embedded therein from the special lens-forming composition that a vinylic crosslinking agent and or organic solvent both of which independent of each other can swell an insert by a moderate swelling degree. The resultant embedded hydrogel contact lenses can be free of deformation and delamination.
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公开(公告)号：US20240280834A1
公开(公告)日：2024-08-22
申请号：US18429551
申请日：2024-02-01
Applicant: Alcon Inc.
Inventor： Feng Jing , Steve Yun Zhang , Richard Charles Breitkopf , Claire Elizabeth Nason-Tomaszewski , Shelby Claytor
CPC classification number: G02C7/04 , C08J7/0427 , C08J2383/10 , C08J2433/14
Abstract: The invention provides an easy-to-remove water gradient contact lens. Such a water gradient contact lens comprises imperfections (ditches and/or gaps) in the anterior outer hydrogel layer and can be made according to a cost-effective method involving a step of partially or completely shielding reactive functional groups in selected zones on the anterior surface a to-be-coated contact lens before grafting a layer of a non-silicone hydrogel material. With the imperfections in the anterior outer hydrogel layer, the surface lubricity of the anterior surface is inferior to that of the posterior surface. By adjusting the shape, size, density, and rotational distribution of the imperfections, one also can selectively adjust and optimize the surface lubricity of the anterior surface of a water gradient contact lens so as to have improved lens handlability while maintaining other desirable properties.
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公开(公告)号：US20220305747A1
公开(公告)日：2022-09-29
申请号：US17701819
申请日：2022-03-23
Applicant: Alcon Inc.
Inventor： Richard Charles Breitkopf , Zahra Bassampour , Chandana Kolluru , Steve Yun Zhang
Abstract: The invention relates to a method for producing embedded hydrogel contact lenses each having a magnetized insert that comprises magnetic particles and is centrally embedded in the bulk hydrogel material of the embedded hydrogel contact lens. During molding, a magnetized insert can be centered and held in position in a lens mold by using a magnet placed below the lens mold. The invention also relates to an embedded hydrogel contact lens produced from a method of the invention.
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Patent Agency Ranking
公开(公告)号：US11427685B2
公开(公告)日：2022-08-30
申请号：US16365973
申请日：2019-03-27
Applicant: Alcon Inc.
Inventor： Daqing Wu , Steve Yun Zhang , Junhao Ge , Richard Charles Breitkopf , Augustine Twum Kumi , Weihong Lang
IPC: B29D11/00 , C08G77/442 , G02B1/04 , B29K83/00 , B29K105/00 , C08G77/00
Abstract: The invention provides a method for making silicone hydrogel contact lenses. The method of the invention is characterized by using an organic solvent as a processing-aid tool for controlling lens diameter without significantly affecting lens equilibrium water content during cast-molding of soft contact lenses from a polymerizable composition. By adjusting the weight percentage of the organic solvent in a polymerizable composition for making SiHy contact lenses, one can adjust lens diameter of produced SiHy lenses to meet target without affecting adversely the lens properties.
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公开(公告)号：US20210011197A1
公开(公告)日：2021-01-14
申请号：US17038266
申请日：2020-09-30
Applicant: Alcon Inc.
Inventor： Daqing Wu , Junhao Ge , Steve Yun Zhang , Richard Charles Breitkopf , Xinming Qian , Zach Munoz , Matthew D. Nelson , Augustine Twum Kumi , Weihong Lang , Ying Zheng , Feng Jing , Frank Chang
Abstract: The present invention generally relates to inherently wettable silicone hydrogel contact lenses having relatively high oxygen permeability, relatively high equilibrium water content and relatively low elastic modulus. The present invention is also related to a method for making such inherently wettable silicone hydrogel contact lenses.
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公开(公告)号：US20200376788A1
公开(公告)日：2020-12-03
申请号：US16884536
申请日：2020-05-27
Applicant: Alcon Inc.
Inventor： Richard Charles Breitkopf , Changhong Yin , Steve Yun Zhang
Abstract: The invention relates to a pad printing instrument comprising an ink supply system capable of control the temperature, viscosity and colorant concentration of an ink in an ink cup. Such controls are achieved by continuously adding and mixing a cold ink having a composition identical to the ink in the ink cup but having a lower temperature. The continuous addition of a small amount of a cold ink into the ink cup could compensate heat generated by the friction between the ink cup and a cliché and could minimize the evaporation of a diluent in the ink and change in the concentration of colorants in the ink and ink viscosity. The invention also relates to use of a pad printing instrument comprising an ink supply system of the invention for producing colored hydrogel or silicone hydrogel contact lenses.
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公开(公告)号：US20240399685A1
公开(公告)日：2024-12-05
申请号：US18678916
申请日：2024-05-30
Applicant: Alcon Inc.
Inventor： Richard Charles Breitkopf , Newton T. Samuel , Ya-Wen Chang , Zahra Bassampour , Steve Yun Zhang
IPC: B29D11/00 , B29C33/42 , B29C39/00 , B29C39/02 , B29C39/10 , B29C39/26 , B29K83/00 , B29K105/00 , B29K683/00 , B29L11/00
Abstract: The invention provides a method for producing embedded contact lenses involving a mold set in a two-curing-step process and a fast-curing SiHy lens formulation. The mold set consists of three mold halves, one of which is used twice, the first time for molding an insert from an insert-forming composition and the second time for an embedded contact lens with the molded insert embedded therein from the fast curing SiHy lens formulation that comprises a N,N-dialkylacrylamide, a hydrophilic (meth)acrylamido monomer, and a polysiloxane vinylic crosslinker and being free of any siloxane-containing vinylic monomer.
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公开(公告)号：US20240399684A1
公开(公告)日：2024-12-05
申请号：US18678833
申请日：2024-05-30
Applicant: Alcon Inc.
Inventor： Newton T. Samuel , Ya-Wen Chang , Richard Charles Breitkopf , Augustine Twum Kumi , Steve Yun Zhang , David Borja , Ethan Leveillee , Joseph Michael Lindacher
IPC: B29D11/00 , B29C35/08 , B29K105/24 , B29L11/00 , G02B1/04
Abstract: The invention provides a method for producing embedded diffractive contact lenses involving use of a mold set in two-curing steps. The mold set consists of three mold halves, one of which is used twice, the first time for molding a diffractive insert and the second time for an embedded contact lens with the molded diffractive insert embedded therein. The twice-used mold half has been treated with a corona plasma or a vacuum UV in a central circular area having a diameter equal to or smaller than the diameter of the insert to ensure that the molded insert consistently adheres to the twice-used mold half, even though the other mating insert mold half for molding the diffractive insert has a great tendency to bind strongly the molded insert due to the diffractive structure on its molding surface.
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