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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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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：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：US20230357478A1
公开(公告)日：2023-11-09
申请号：US18313489
申请日：2023-05-08
Applicant: Alcon Inc.
Inventor： Newton T. Samuel , Cornelius Daniel Niculas , Richard Charles Breitkopf , Nicholas Gober , Chandana Kolluru , Zahra Bassampour , Steve Yun Zhang
IPC: C08F283/12
CPC classification number: C08F283/124
Abstract: A method for producing embedded hydrogel contact lenses comprises at least the following steps: depositing a small drop of a viscous lens-forming composition in the center of a female lens mold half; placing a preformed insert on top of the small drop precisely in the center of the female lens mold half so that the insert is held by capillary forces due to the presence of a thin layer of the viscous lens-forming composition between the insert and the molding surface of the female lens mold half; dosing an amount of another less viscous lens-forming composition on top of the insert to immerse the insert in the female lens mold half; closing tightly a male lens mold half onto the top of the female lens mold half halves to form a molding assembly; curing both the lens-forming compositions in the molding assembly to form an embedded hydrogel lens precursor.
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公开(公告)号：US20230004023A1
公开(公告)日：2023-01-05
申请号：US17838358
申请日：2022-06-13
Applicant: Alcon Inc.
Inventor： Zahra Bassampour , Chandana Kolluru , Steve Yun Zhang , Adam K. Sniady , Thomas M. Moy , Frank Chang , David Borja , Joseph Michael Lindacher , Ying Pi
Abstract: The invention provides a delamination-resistant embedded silicone hydrogel contact lens having an insert that is embedded in a silicone hydrogel bulk material. The insert is made of a crosslinked polymeric material having a refractive index higher than that of the silicone hydrogel bulk material by at least 0.07 and comprises a diffractive structure disposed on one of the front and back curve surfaces of the insert for providing a diffractive power that contributes to the overall optical power of the contact lens.
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Patent Agency Ranking
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：US20210292558A1
公开(公告)日：2021-09-23
申请号：US17205212
申请日：2021-03-18
Applicant: Alcon Inc.
Inventor： Zahra Bassampour , Jing Cheng , Steve Yun Zhang
IPC: C08L83/06 , C08F220/12
Abstract: The invention is generally related to an embedded silicone hydrogel contact lens comprising a silicone hydrogel material and a hydrophobic insert. The silicone hydrogel material comprises repeating units of at least one first polysiloxane vinylic crosslinker comprising hydrophilized siloxane units each having one methyl substituent and one organic radical including at least one H-bond donor (e.g., hydroxyl groups), wherein the content of said at least one H-bond donor is at least 0.8 meq/g relative to the molecular weight of said at least one first polysiloxane vinylic crosslinker. The hydrophobic insert is composed of a crosslinked polymeric material comprising at least 40% by mole of acrylic repeating units and at least 6% by mole of repeating units of at least one vinylic crosslinking agent. The embedded silicone hydrogel is not susceptible to delamination.
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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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