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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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公开(公告)号：US12194699B2
公开(公告)日：2025-01-14
申请号：US17710199
申请日：2022-03-31
Applicant: Alcon Inc.
Inventor： Zahra Bassampour , Chandana Kolluru , Steve Yun Zhang , Junhao Ge , Yang Zheng , Cornelius Daniel Niculas , David Andrew Icenogle , Jing Cheng , Yuan Chang , Augustine Twum Kumi , Michelle Plavnik
Abstract: The invention relates to a method for producing embedded hydrogel contact lenses involving a set of 3-mold halves consisting essentially of: one female lens mold half having a molding surface defining the anterior surface of a contact lens; one male lens mold half having a molding surface defining the posterior surface of the contact lens; and an insert mold half having a molding surface defining one of the front and back surfaces of an insert. One of the lens mold halves is used twice: first with the insert mold half for molding an insert during first curing process and then with the other lens mold half for molding an embedded hydrogel contact lens with the molded insert embedded partially or fully therein during second curing process. The invention also relates to embedded hydrogel contact lenses produced from a method of the invention.
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公开(公告)号：US12194698B2
公开(公告)日：2025-01-14
申请号：US17701819
申请日：2022-03-23
Applicant: Alcon Inc.
Inventor： Richard Charles Breitkopf , Zahra Bassampour , Chandana Kolluru , Steve Yun Zhang
IPC: G02C7/00 , B29C45/14 , B29D11/00 , C08J3/075 , C08J3/24 , G02C7/02 , G02C7/04 , B29C33/38 , B29K83/00 , B29K633/04
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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公开(公告)号：US20220324187A1
公开(公告)日：2022-10-13
申请号：US17710199
申请日：2022-03-31
Applicant: Alcon Inc.
Inventor： Zahra Bassampour , Chandana Kolluru , Steve Yun Zhang , Junhao Ge , Yang Zheng , Cornelius Daniel Niculas , David Andrew Icenogle , Jing Cheng , Yuan Chang , Augustine Twum Kumi , Michelle Plavnik
Abstract: The invention relates to a method for producing embedded hydrogel contact lenses involving a set of 3-mold halves consisting essentially of: one female lens mold half having a molding surface defining the anterior surface of a contact lens; one male lens mold half having a molding surface defining the posterior surface of the contact lens; and an insert mold half having a molding surface defining one of the front and back surfaces of an insert. One of the lens mold halves is used twice: first with the insert mold half for molding an insert during first curing process and then with the other lens mold half for molding an embedded hydrogel contact lens with the molded insert embedded partially or fully therein during second curing process. The invention also relates to embedded hydrogel contact lenses produced from a method of the invention.
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公开(公告)号：US20230339148A1
公开(公告)日：2023-10-26
申请号：US18306625
申请日：2023-04-25
Applicant: Alcon Inc.
CPC classification number: B29C39/026 , B29C39/006 , B29C39/021 , B29C39/26 , B29C39/36 , B29C39/028 , G02B1/043 , B29K2101/10
Abstract: The invention relates to a method for producing embedded hydrogel contact lenses each having an insert that comprises alignment features capable of capable of aligning the insert in depth and radial position in a female mold half during cast molding of an embedded hydrogel contact lens. The alignment features protrude from the front surface, are rotationally symmetric with respect to the central axis of the insert and independently have a shape having a curvature being greater than 2 folds of the curvature of the molding surface so as to minimize contacting area between the alignment features and the molding surface. The use of such an insert can simplify the process for producing embedded hydrogel contact lenses and enable the process to be implemented readily in an automatic production.
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Patent Agency Ranking
公开(公告)号：US20210263192A1
公开(公告)日：2021-08-26
申请号：US17316248
申请日：2021-05-10
Applicant: Alcon Inc.
Inventor： Chandana Kolluru , Bradley Quinter
Abstract: The invention is related to a cost-effective method for making a silicone hydrogel contact lens having a crosslinked hydrophilic coating thereon. A method of the invention involves autoclaving, in a sealed lens package, a silicone hydrogel contact lens having a base coating of polyacrylic acid thereon in an aqueous solution in the presence of a water-soluble, crosslinkable hydrophilic polymeric material having epoxide groups, for a period of time sufficient to covalently attach the crosslinkable hydrophilic polymeric material onto the surface of the silicone hydrogel contact lens through covalent linkages each formed between one epoxide group and one of the carboxyl groups on and/or near the surface of the silicone hydrogel contact lens.
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公开(公告)号：US20210130648A1
公开(公告)日：2021-05-06
申请号：US17146181
申请日：2021-01-11
Applicant: Alcon Inc.
Inventor： Yongxing Qiu , Newton T. Samuel , John Dallas Pruitt , Chandana Kolluru , Arturo Norberto Medina , Lynn Cook Winterton , Daqing Wu , Xinming Qian , Jared Nelson
IPC: C09D177/06 , B29D11/00 , G02B1/04 , G02C7/04 , G02B1/10 , G02B1/18 , C08J7/04 , C08L83/04 , C08G77/388 , C08J5/00 , C09D5/16 , C09D133/02 , C09D133/14 , C09D133/26 , C09D171/02
Abstract: The invention is related to a cost-effective method for making a silicone hydrogel contact lens having a crosslinked hydrophilic coating thereon. A method of the invention involves heating a silicone hydrogel contact lens in an aqueous solution in the presence of a water-soluble, highly branched, thermally-crosslinkable hydrophilic polymeric material having positively-charged azetidinium groups, to and at a temperature from about 40° C. to about 140° C. for a period of time sufficient to covalently attach the thermally-crosslinkable hydrophilic polymeric material onto the surface of the silicone hydrogel contact lens through covalent linkages each formed between one azetidinium group and one of the reactive functional groups on and/or near the surface of the silicone hydrogel contact lens, thereby forming a crosslinked hydrophilic coating on the silicone hydrogel contact lens. Such method can be advantageously implemented directly in a sealed lens package during autoclave.
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公开(公告)号：US12111443B2
公开(公告)日：2024-10-08
申请号：US17688041
申请日：2022-03-07
Applicant: Alcon Inc.
Inventor： Michelle Plavnik , Richard Charles Breitkopf , Steve Yun Zhang , Zahra Bassampour , Chandana Kolluru
CPC classification number: G02B1/043 , B29D11/00057 , B29D11/00067 , B29D11/00134 , B29D11/00192 , C08G77/20 , C08L83/04 , G02C7/04 , G02C7/102 , G02C7/108 , B29K2083/00 , B29K2105/0061 , B29K2995/0018 , C08L2201/10 , C08L2203/02 , C08L2312/00 , G02B2207/109
Abstract: Described herein is a method for producing a contact lens comprising a central photochromic zone that has a diameter of about 13 mm or less and is concentric with the central axis of the contact lens. The method comprises: applying a first polymerizable fluid composition containing at least one photochromic compound on a central portion of the molding surface of a female mold half to form a circular layer; partially photocuring, in situ, the circular layer in the female mold half by using a visible light; dispensing a second polymerizable fluid composition over the partially-cured circular layer on the molding surface of the female mold half; and a step of thermally curing the second polymerizable fluid composition and the partially-cured circular layer immersed therein in the mold cavity formed between the molding surfaces of the female mold half and a male mold half.
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公开(公告)号：US20240316886A1
公开(公告)日：2024-09-26
申请号：US18611772
申请日：2024-03-21
Applicant: Alcon Inc.
Inventor： James Reid Lisk, JR. , Thae Hoon An , Daryl Reece , Zahra Bassampour , Tudor Stanescu , Honghui Lu , Justin Joel Aguayo , Aaron Luke Leathley-Andrew , Chandana Kolluru
IPC: B29D11/00 , B29C33/42 , B29L11/00 , C08J3/24 , C09D133/26
CPC classification number: B29D11/00134 , B29C33/42 , C08J3/243 , C09D133/26 , B29L2011/0041
Abstract: The invention is directed to a cast molding method for making embedded hydrogel contact lenses. The method comprises a step of actinically curing a lens-forming composition in specific locations in molding assemblies each of which is formed from one male lens mold half and one female insert mold half having a molded insert adhered thereon and comprises the lens-forming composition filling a gap between the back surface of the mold insert and the molding surface of the male lens mold half. This tack curing step ensures molded inserts adhered through multiple spots to the molding surface of each male lens mold halves which in turn will be used together with a female lens mold half in cast-molding of a lens forming composition to form an embedded silicone hydrogel contact lens.
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公开(公告)号：US11747519B2
公开(公告)日：2023-09-05
申请号：US17316248
申请日：2021-05-10
Applicant: Alcon Inc.
Inventor： Chandana Kolluru , Bradley Quinter
CPC classification number: G02B1/043 , B29D11/00038 , B29D11/00865 , B65B5/04 , G02C7/049 , B29C35/0805 , B29C2035/0827 , B29D11/00134 , B29K2083/00 , B29K2105/0061 , B29K2833/12 , B29K2909/08 , B29K2995/0027 , B29K2995/0092 , G02C2202/16 , G02B1/043 , C08L101/14 , G02B1/043 , C08L101/02
Abstract: The invention is related to a cost-effective method for making a silicone hydrogel contact lens having a crosslinked hydrophilic coating thereon. A method of the invention involves autoclaving, in a sealed lens package, a silicone hydrogel contact lens having a base coating of polyacrylic acid thereon in an aqueous solution in the presence of a water-soluble, crosslinkable hydrophilic polymeric material having epoxide groups, for a period of time sufficient to covalently attach the crosslinkable hydrophilic polymeric material onto the surface of the silicone hydrogel contact lens through covalent linkages each formed between one epoxide group and one of the carboxyl groups on and/or near the surface of the silicone hydrogel contact lens.
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