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公开(公告)号：US20220326412A1
公开(公告)日：2022-10-13
申请号：US17710224
申请日：2022-03-31
Applicant: Alcon Inc.
Inventor： Yuan Chang , Junhao Ge , Ying Pi , Cornelius Daniel Niculas , Yang Zheng , Steve Yun Zhang , Michelle Plavnik , Ethan Leveillee , Jing Cheng , Augustine Twum Kumi
IPC: G02B1/04 , C08G77/442 , B29D11/00 , G02C7/04
Abstract: The invention is directed to an embedded hydrogel contact lens, which comprises an insert sandwiched between two layers of hydrogel materials and can be produced according to a cast molding method including the procedures involving two females halves (FC1 and FC2) and two male halves (BC1 and BC2) and three consequential molding steps involving three molding assemblies: the 1st one formed between FC1 and BC1 for molding an insert; the 2nd one formed between FC1 and BC2 for molding a lens precursor having the molded insert embedded in a layer of a hydrogel material in a way that the front surface of the molded insert merges with the convex surface of the lens precursor; and the 3rd one formed between FC2 and BC2 for molding an embedded hydrogel contact of the invention.
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公开(公告)号：US20210347929A1
公开(公告)日：2021-11-11
申请号：US17313459
申请日：2021-05-06
Applicant: Alcon Inc.
Inventor： Jing Cheng , Yang Zheng , Steve Yun Zhang , Lindsay Olson
IPC: C08F283/12 , C08J3/075
Abstract: The invention provides a contact lens manufacturing method comprising a process for removing unprocessed molded silicone hydrogel contact lenses from mold halves in a relatively efficient and consistent manner. The method of the invention involves using a silicone fluid (or so-called silicone oil) as non-reactive diluent in SiHy lens formulation for making SiHy contact lenses. Resultant SiHy contact lenses cast-molded from such a SiHy lens formulation can have a significantly reduced adhesion force with the molding surfaces of a lens mold and consequently a higher efficiency and consistency in removing unprocessed molded SiHy contact lenses from mold halves can be achieved. This method of the invention can be easily implemented in a production environment for enhancing the production yield.
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公开(公告)号：US11833770B2
公开(公告)日：2023-12-05
申请号：US17205148
申请日：2021-03-18
Applicant: Alcon Inc.
Inventor： Yang Zheng , Junhao Ge , Steve Yun Zhang
CPC classification number: B29D11/00038 , C08J3/075 , C08J3/24 , C08L83/04 , G02B1/043 , C08L2203/02
Abstract: The invention is generally related to a method for producing, in a relatively efficient and consistent manner, embedded or hybrid silicone hydrogel contact lenses, and also to unprocessed embedded or hybrid silicone hydrogel contact lenses, according to conventional cast-molding technologies. A method of the invention involve use of a polymeric non-reactive diluent in preparing a polymerizable composition for forming the silicone hydrogel material of the unprocessed embedded or hybrid silicone hydrogel contact lens, which is cast-molded with a lens mold. The unprocessed cast-molded embedded or hybrid silicone hydrogel contact lens has no or a minimal water-swelling degree, so that lens distortion or delamination during the hydration of the unprocessed embedded or hybrid silicone hydrogel contact lens.
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公开(公告)号：US12116442B2
公开(公告)日：2024-10-15
申请号：US17313459
申请日：2021-05-06
Applicant: Alcon Inc.
Inventor： Jing Cheng , Yang Zheng , Steve Yun Zhang , Lindsay Olson
IPC: C08F283/12 , C08J3/075
CPC classification number: C08F283/12 , C08J3/075 , C08J2383/10
Abstract: The invention provides a contact lens manufacturing method comprising a process for removing unprocessed molded silicone hydrogel contact lenses from mold halves in a relatively efficient and consistent manner. The method of the invention involves using a silicone fluid (or so-called silicone oil) as non-reactive diluent in SiHy lens formulation for making SiHy contact lenses. Resultant SiHy contact lenses cast-molded from such a SiHy lens formulation can have a significantly reduced adhesion force with the molding surfaces of a lens mold and consequently a higher efficiency and consistency in removing unprocessed molded SiHy contact lenses from mold halves can be achieved. This method of the invention can be easily implemented in a production environment for enhancing the production yield.
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公开(公告)号：US20230166467A1
公开(公告)日：2023-06-01
申请号：US18070189
申请日：2022-11-28
Applicant: Alcon Inc.
Inventor： Yang Zheng , Cornelius Daniel Niculas , Yuan Chang , Junhao Ge , Steve Yun Zhang , Justin Joel Aguayo , David Andrew Icenogle , Muhammad Waqas Asif , Daryl Reece
CPC classification number: B29D11/00519 , B29D11/00038 , G02B1/043 , G02C7/04 , B29K2083/00
Abstract: Systems, devices, and methods are disclosed for fabricating a hybrid contact lens product having a lens insert embedded at a precisely controlled location within a lens body. A mold engagement and support base engages and retains a lens forming mold in a substantially fixed position. An insert placement and positioning device includes an insert pickup head with a contact face configured for releasable engagement of the lens insert and at least one suction opening in the contact face for applying suction to engage the insert on the contact face. A positioning housing interacts with the mold and/or the support base to provide precise locational positioning of the lens insert within the mold. A lens body forming material is delivered to the mold to encapsulate the lens insert.
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Patent Agency Ranking
公开(公告)号：US20230117502A1
公开(公告)日：2023-04-20
申请号：US18047312
申请日：2022-10-18
Applicant: Alcon Inc.
Inventor： Michelle Plavnik , Junhao Ge , Steve Yun Zhang , Ethan Leveillee , Yang Zheng , Yuan Chang
IPC: B29D11/00
Abstract: A dosing system and method for delivery of contact lens formulation(s) to a contact lens forming mold. The system includes a carrier portion configured for holding a contact lens mold, and an alignment mandrel configured for retaining a lens formulation delivery device. The lens formulation delivery device is retained in a specified position relative to the contact lens mold for precise location of delivery of the lens formulation within the contact lens mold. A first lens formulation can be dosed to a center location in the mold, and a different second lens formulation can be dosed to a ring-shaped pattern around the center location, to form a contact lens having different center and edge characteristics.
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公开(公告)号：US20210291469A1
公开(公告)日：2021-09-23
申请号：US17205148
申请日：2021-03-18
Applicant: Alcon Inc.
Inventor： Yang Zheng , Junhao Ge , Steve Yun Zhang
Abstract: The invention is generally related to a method for producing, in a relatively efficient and consistent manner, embedded or hybrid silicone hydrogel contact lenses, and also to unprocessed embedded or hybrid silicone hydrogel contact lenses, according to conventional cast-molding technologies. A method of the invention involve use of a polymeric non-reactive diluent in preparing a polymerizable composition for forming the silicone hydrogel material of the unprocessed embedded or hybrid silicone hydrogel contact lens, which is cast-molded with a lens mold. The unprocessed cast-molded embedded or hybrid silicone hydrogel contact lens has no or a minimal water-swelling degree, so that lens distortion or delamination during the hydration of the unprocessed embedded or hybrid silicone hydrogel contact lens.
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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：US11833771B2
公开(公告)日：2023-12-05
申请号：US17710248
申请日：2022-03-31
Applicant: Alcon Inc.
Inventor： Yuan Chang , Junhao Ge , Steve Yun Zhang , Michelle Plavnik , Yang Zheng , Jing Cheng , Augustine Twum Kumi
CPC classification number: B29D11/00134 , C08L83/14 , G02C7/04 , G02C7/102 , B29K2083/00 , C08L2203/02 , C08L2205/03
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, in the center of the molding surface of a male mold half, a drop (having a volume of about 5 μL or less) of a first polymerizable fluid composition containing at least one photochromic compound and a relatively-high molecular weight polysiloxane vinylic crosslinker for increasing the viscosity and adhesion on the molding surface of the male mold half; dosing a second polymerizable fluid composition in a female mold hald; closing the female mold hald with the male mold half with the drop thereon to form a molding assembly; and curing the second polymerizable fluid composition and the drop of the first polymerizable fluid composition in the molding assembly.
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公开(公告)号：US20220339895A1
公开(公告)日：2022-10-27
申请号：US17710248
申请日：2022-03-31
Applicant: Alcon Inc.
Inventor： Yuan Chang , Junhao Ge , Steve Yun Zhang , Michelle Plavnik , Yang Zheng , Jing Cheng , Augustine Twum Kumi
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, in the center of the molding surface of a male mold half, a drop (having a volume of about 5 μL or less) of a first polymerizable fluid composition containing at least one photochromic compound and a relatively-high molecular weight polysiloxane vinylic crosslinker for increasing the viscosity and adhesion on the molding surface of the male mold half; dosing a second polymerizable fluid composition in a female mold hald; closing the female mold hald with the male mold half with the drop thereon to form a molding assembly; and curing the second polymerizable fluid composition and the drop of the first polymerizable fluid composition in the molding assembly.
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