Patents by Inventor Alice Weimin Liu
Alice Weimin Liu 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).
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Patent number: 11433630Abstract: The present invention generally relates to a method for producing silicone hydrogel contact lenses having less optical defects or free of optical defects by subjecting the extraction tray for the formed silicone hydrogel contact lenses to a reciprocating lowering and raising motion thereof to obtain the silicone hydrogel contact lenses.Type: GrantFiled: December 10, 2019Date of Patent: September 6, 2022Assignee: Alcon Inc.Inventors: Honghui Lu, Mark Neely, Alice Weimin Liu, Xuxian Niu, Uwe Haken
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Publication number: 20220266554Abstract: The invention provides a method producing contact lenses, comprising the step of: separating the mold into the male and female mold halves, with the silicone hydrogel contact lens adhered on one of the male and female mold halves; bring a shaped ultrasonic horn in direct contact with at least one area of a non-optical surface of the female mold half or the male mold half having the molded silicone hydrogel contact lens attached thereon; and applying a ultrasonic vibrational energy to the at least one area of the non-optical surface of the female mold half or the male mold half having the molded silicone hydrogel contact lens attached thereon so as to separate the molded silicone hydrogel contact lens from the mold half attached thereon.Type: ApplicationFiled: May 11, 2022Publication date: August 25, 2022Inventors: Alice Weimin Liu, Daryl Reece, Kirk Cooper, Shridhar Natarajan, John Janders, Uwe Haken, Stacey Elliott
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Patent number: 11358353Abstract: The invention provides a method producing contact lenses, comprising the step of: separating the mold into the male and female mold halves, with the silicone hydrogel contact lens adhered on one of the male and female mold halves; bring a shaped ultrasonic horn in direct contact with at least one area of a non-optical surface of the female mold half or the male mold half having the molded silicone hydrogel contact lens attached thereon; and applying a ultrasonic vibrational energy to the at least one area of the non-optical surface of the female mold half or the male mold half having the molded silicone hydrogel contact lens attached thereon so as to separate the molded silicone hydrogel contact lens from the mold half attached thereon.Type: GrantFiled: December 14, 2017Date of Patent: June 14, 2022Assignee: Alcon Inc.Inventors: Alice Weimin Liu, Daryl Reece, Kirk Cooper, Shridhar Natarajan, John Janders, Uwe Haken, Stacey Elliott
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Patent number: 11111055Abstract: An embodiment of the invention is a basket for holding contact lenses. The basket comprises a first basket and a second basket mating members, each basket member includes a basket wall defining a first cavity, a planar flange extending out around the first cavity, a plurality of spaced fingers extending upward circumferentially from the periphery of the cavity, wherein the first basket and second basket mating members having a same structure, wherein the first basket and second basket mating members forming a second cavity when mated for receiving said contact lens, the cavity inhibiting inversion or rolling over of said contact lens when emplaced therein. A tray that comprises a plurality of baskets is another embodiment of the invention. In addition, the invention provides a stack assembly that comprises a plurality of trays each of which comprises a plurality of baskets.Type: GrantFiled: December 11, 2018Date of Patent: September 7, 2021Assignee: Alcon Inc.Inventors: Daryl Reece, Uwe Haken, Honghui Lu, Oli Jobe, Alice Weimin Liu
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Publication number: 20200189216Abstract: The present invention generally relates to a method for producing silicone hydrogel contact lenses having less optical defects or free of optical defects by subjecting the extraction tray for the formed silicone hydrogel contact lenses to a reciprocating lowering and raising motion thereof to obtain the silicone hydrogel contact lenses.Type: ApplicationFiled: December 10, 2019Publication date: June 18, 2020Inventors: Honghui Lu, Mark Neely, Alice Weimin Liu, Xuxian Niu, Uwe Haken
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Patent number: 10471669Abstract: The invention is directed to a reusable mold for making a contact lens and the reusable mold has at least one of the mold halves is made from an oxide glass having a Knoop Hardness less than HK 350. The invention is also directed to a method for making an optical part by single point diamond turning an oxide glass having a Knoop Hardness HK less than 350.Type: GrantFiled: June 21, 2018Date of Patent: November 12, 2019Assignee: Novartis AGInventors: Alice Weimin Liu, Gregory L. Herron
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Patent number: 10328645Abstract: The present invention general related to a method and a reusable mold for making a contact lens, comprising a first mold half having a first mold surface in contact with a hydrogel contact lens forming composition and a second mold half having a second mold surface in contact with the lens forming composition, wherein the first mold half and the second mold half are configured to receive each other such that a cavity is formed between the first mold surface and the second mold surface, wherein the cavity defines the shape of a contact lens to be molded, wherein the lens forming composition is polymerizable and/or crosslinkable by an actinic radiation, wherein at least one of the mold halves having an absorbing antireflective coating, wherein the reusable mold is a non-plastic mold.Type: GrantFiled: November 9, 2016Date of Patent: June 25, 2019Assignee: NOVARTIS AGInventors: Alice Weimin Liu, Ying Pi
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Publication number: 20190185209Abstract: An embodiment of the invention is a basket for holding contact lenses. The basket comprises a first basket and a second basket mating members, each basket member comprises a basket wall defining a first cavity, a planar flange extending out around the first cavity, a plurality of spaced fingers extending upward circumferentially from the periphery of the cavity, wherein the first basket and second basket mating members having a same structure, wherein the first basket and second basket mating members forming a second cavity when mated for receiving said contact lens, the cavity inhibiting inversion or rolling over of said contact lens when emplaced therein. A tray that comprises a plurality of baskets is another embodiment of the invention. In addition, the invention provides a stack assembly that comprises a plurality of trays each of which comprises a plurality of baskets.Type: ApplicationFiled: December 11, 2018Publication date: June 20, 2019Inventors: Daryl Reece, Uwe Haken, Honghui Lu, Oli Jobe, Alice Weimin Liu
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Patent number: 10232574Abstract: The present invention general related to a reusable mold and a method of using the mold to manufacture contact lenses. The mold comprises a first mold half having a first mold surface in contact with a lens forming composition and a second mold half having a second mold surface in contact with the lens forming composition, wherein the first mold half and the second mold half are configured to receive each other such that a cavity is formed between the first mold surface and the second mold surface, wherein the cavity defines the shape of a contact lens to be molded, wherein the lens forming composition is polymerizable and/or crosslinkable by an actinic radiation, wherein at least one of the mold halves is a precision press molded mold made from an oxide glass selected from a group consisting of borosilicates glass and fluorophosphates glass.Type: GrantFiled: December 16, 2015Date of Patent: March 19, 2019Assignee: NOVARTIS AGInventors: Alice Weimin Liu, Burkhard Dietrich
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Publication number: 20190016074Abstract: The invention is directed to a reusable mold for making a contact lens and the reusable mold has at least one of the mold halves is made from an oxide glass having a Knoop Hardness less than HK 350. The invention is also directed to a method for making an optical part by single point diamond turning an oxide glass having a Knoop Hardness HK less than 350.Type: ApplicationFiled: June 21, 2018Publication date: January 17, 2019Inventors: Alice Weimin Liu, Gregory L. Herron
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Patent number: 10160141Abstract: The present invention general related to a mold for making a contact lens comprises a first mold half having a first mold surface in contact with a polymerizable and/or crosslinkable silicone containing lens forming composition and a second mold half having a second mold surface in contact with the lens-forming composition, and the first mold half and the second mold half are configured to receive each other such that a cavity is formed between the first mold surface and the second mold surface. The cavity defines the shape of a contact lens to be molded. At least one of the mold halves is made from a sulfur containing polymer having a refraction index greater than 1.5. The dimension stability of the plastic mold can be improved.Type: GrantFiled: November 16, 2015Date of Patent: December 25, 2018Assignee: Novartis AGInventors: Alice Weimin Liu, Gregory L. Herron
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Patent number: 10022925Abstract: The invention is directed to a reusable mold for making a contact lens and the reusable mold has at least one of the mold halves is made from an oxide glass having a Knoop Hardness less than HK 350. The invention is also directed to a method for making an optical part by single point diamond turning an oxide glass having a Knoop Hardness HK less than 350.Type: GrantFiled: December 18, 2014Date of Patent: July 17, 2018Assignee: Novartis AGInventors: Alice Weimin Liu, Gregory L. Herron
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Publication number: 20180169981Abstract: The invention provides a method producing contact lenses, comprising the step of: separating the mold into the male and female mold halves, with the silicone hydrogel contact lens adhered on one of the male and female mold halves; bring a shaped ultrasonic horn in direct contact with at least one area of a non-optical surface of the female mold half or the male mold half having the molded silicone hydrogel contact lens attached thereon; and applying a ultrasonic vibrational energy to the at least one area of the non-optical surface of the female mold half or the male mold half having the molded silicone hydrogel contact lens attached thereon so as to separate the molded silicone hydrogel contact lens from the mold half attached thereon.Type: ApplicationFiled: December 14, 2017Publication date: June 21, 2018Inventors: Alice Weimin Liu, Daryl Reece, Kirk Cooper, Shridhar Natarajan, John Janders, Uwe Haken, Stacey Elliott
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Patent number: 9981435Abstract: The present invention general related to a method and a reusable mold for making a contact lens, comprising a first mold half having a first mold surface in contact with a silicone containing lens forming composition and a second mold half having a second mold surface in contact with the lens forming composition. The first mold half and the second mold half are configured to receive each other such that a cavity is formed between the first mold surface and the second mold surface. The cavity defines the shape of a contact lens to be molded. The lens forming composition is polymerizable and/or crosslinkable by actinic radiation. The reusable mold has at least one of the mold halves is made from chalcogenide glasses, Zinc Selenide or Zinc Sulfide.Type: GrantFiled: December 16, 2015Date of Patent: May 29, 2018Assignee: Novartis AGInventor: Alice Weimin Liu
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Patent number: 9981436Abstract: The present invention general related to a method and a reusable mold for making a contact lens, comprising a first mold half having a first mold surface in contact with a silicone containing lens forming composition and a second mold half having a second mold surface in contact with the lens forming composition. The first mold half and the second mold half are configured to receive each other such that a cavity is formed between the first mold surface and the second mold surface, wherein the cavity defines the shape of a contact lens to be molded. The lens forming composition is polymerizable and/or crosslinkable by a UV radiation, wherein at least one of the mold halves is made from an oxide glass material having a UV transmission cut-off wavelength no less than 390 nm and a specific gravity higher than 3.5.Type: GrantFiled: December 16, 2015Date of Patent: May 29, 2018Assignee: Novartis AGInventors: Alice Weimin Liu, Burkhard Dietrich
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Publication number: 20180056613Abstract: A method for dispensing a material into a mold for forming contact lenses, comprises the steps of: (1) providing a contact lens mold, (2) providing a dispensing needle, wherein the dispensing needle is made from a material having a surface energy less than 32 dynes/cm, (3) arranging the contact lens mold underneath the dispensing needle, (4) dispersing a fluid composition into a mold for making a contact lens, wherein the fluid composition comprises a lens-forming material, and the lens-forming material containing a solvent and is crosslinkable and/or polymerizable by thermal curing or actinic radiation.Type: ApplicationFiled: August 28, 2017Publication date: March 1, 2018Inventors: Alice Weimin Liu, Steve Crowley
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Patent number: 9864108Abstract: The present invention general related to a reusable mold for making a contact lens comprises a first mold half having a first mold surface in contact with a polymerizable and/or crosslinkable silicone containing lens forming composition and a second mold half having a second mold surface in contact with the lens-forming composition, and the first mold half and the second mold half are configured to receive each other such that a cavity is formed between the first mold surface and the second mold surface. The cavity defines the shape of a contact lens to be molded. The reusable mold has at least one of the mold halves being made from an oxide glass comprising fluorine and/or fluoride. The mold made by oxide glass comprising fluorine and/or fluoride demonstrates improving mold cleanability with water based cleaning process.Type: GrantFiled: December 18, 2014Date of Patent: January 9, 2018Assignee: Norvartis AGInventors: Alice Weimin Liu, Burkhard Dietrich
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Publication number: 20170173902Abstract: The present invention general related to a method and a reusable mold for making a contact lens, comprising a first mold half having a first mold surface in contact with a hydrogel contact lens forming composition and a second mold half having a second mold surface in contact with the lens forming composition, wherein the first mold half and the second mold half are configured to receive each other such that a cavity is formed between the first mold surface and the second mold surface, wherein the cavity defines the shape of a contact lens to be molded, wherein the lens forming composition is polymerizable and/or crosslinkable by an actinic radiation, wherein at least one of the mold halves having an absorbing antireflective coating, wherein the reusable mold is a non-plastic mold.Type: ApplicationFiled: November 9, 2016Publication date: June 22, 2017Inventors: Alice Weimin Liu, Ying Pi
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Publication number: 20160176132Abstract: The present invention general related to a method and a reusable mold for making a contact lens, comprising a first mold half having a first mold surface in contact with a silicone containing lens forming composition and a second mold half having a second mold surface in contact with the lens forming composition. The first mold half and the second mold half are configured to receive each other such that a cavity is formed between the first mold surface and the second mold surface. The cavity defines the shape of a contact lens to be molded. The lens forming composition is polymerizable and/or crosslinkable by actinic radiation. The reusable mold has at least one of the mold halves is made from chalcogenide glasses, Zinc Selenide or Zinc Sulfide.Type: ApplicationFiled: December 16, 2015Publication date: June 23, 2016Inventor: Alice Weimin Liu
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Publication number: 20160176133Abstract: The present invention general related to a reusable mold and a method of using the mold to manufacture contact lenses. The mold comprises a first mold half having a first mold surface in contact with a lens forming composition and a second mold half having a second mold surface in contact with the lens forming composition, wherein the first mold half and the second mold half are configured to receive each other such that a cavity is formed between the first mold surface and the second mold surface, wherein the cavity defines the shape of a contact lens to be molded, wherein the lens forming composition is polymerizable and/or crosslinkable by an actinic radiation, wherein at least one of the mold halves is a precision press molded mold made from an oxide glass selected from a group consisting of borosilicates glass and fluorophosphates glass.Type: ApplicationFiled: December 16, 2015Publication date: June 23, 2016Inventors: Alice Weimin Liu, Burkhard Dietrich