Patents by Inventor John Dallas Pruitt

John Dallas Pruitt 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).

  • Patent number: 11534994
    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.
    Type: Grant
    Filed: January 11, 2021
    Date of Patent: December 27, 2022
    Assignee: Alcon Inc.
    Inventors: Yongxing Qiu, Newton T. Samuel, John Dallas Pruitt, Chandana Kolluru, Arturo Norberto Medina, Lynn Cook Winterton, Daqing Wu, Xinming Qian, Jared Nelson
  • Publication number: 20220299796
    Abstract: The invention is related to a method for producing soft contact lenses comprises a silicone hydrogel lens body and a composite coating thereon. The composite coating comprises: a plasma base coating which is chemically-attached directly onto the surface of the silicone hydrogel contact lens and functions as a fail-proof measure for ensuring the hydrophobic silicone hydrogel lens material to be shielded from any exposure to ocular environments even after at least 30 days of daily uses including daily waring and daily cleaning/disinfecting; and a relatively-durable lubricious hydrogel top coating for ensuring wearing comfort.
    Type: Application
    Filed: June 7, 2022
    Publication date: September 22, 2022
    Inventors: Yongxing Qiu, John Dallas Pruitt, Kelly Kayi Tallau, Angela Driver-Scott, Chung-Yuan Chiang
  • Publication number: 20220281190
    Abstract: The invention is related to a hydrated silicone hydrogel contact lens having a layered structural configuration: a lower water content silicone hydrogel core (or bulk material) completely covered with a layer of a higher water content hydrogel totally or substantially free of silicone. A hydrated silicone hydrogel contact lens of the invention possesses high oxygen permeability for maintaining the corneal health and a soft, water-rich, lubricious surface for wearing comfort.
    Type: Application
    Filed: May 23, 2022
    Publication date: September 8, 2022
    Inventors: Yongxing Qiu, John Dallas Pruitt, Sibichen J. Thekveli, Robert Carey Tucker, Jared Nelson
  • Patent number: 11385478
    Abstract: The invention is related to a method for producing soft contact lenses comprises a silicone hydrogel lens body and a composite coating thereon. The composite coating comprises: a plasma base coating which is chemically-attached directly onto the surface of the silicone hydrogel contact lens and functions as a fail-proof measure for ensuring the hydrophobic silicone hydrogel lens material to be shielded from any exposure to ocular environments even after at least 30 days of daily uses including daily waring and daily cleaning/disinfecting; and a relatively-durable lubricious hydrogel top coating for ensuring wearing comfort.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: July 12, 2022
    Assignee: Alcon Inc.
    Inventors: Yongxing Qiu, John Dallas Pruitt, Kelly Kayi Tallau, Angela Driver-Scott, Chung-Yuan Chiang
  • Publication number: 20220197056
    Abstract: The invention is directed to a cosmetic functional contact lens having a pupil section, a generally annular iris section surrounding the pupil section for detecting at least one target analyte or physical attribute, comprising: a substrate for supporting electronic components and providing structural support for the functional contact lens; at least one sensing element disposed on the substrate for sensing the at least one target analyte or physical attribute and undergoing a physical change representing a sensed signal; an antenna disposed on the substrate for transmitting the sensed signal to an external device, the antenna being coupled to the at least one sensing element; a colored, printed, opaque, intermittent cosmetic pattern to mask the embedded electronic components.
    Type: Application
    Filed: December 17, 2021
    Publication date: June 23, 2022
    Inventors: Robert Carey Tucker, John Dallas Pruitt
  • Patent number: 11364695
    Abstract: The invention is related to a hydrated silicone hydrogel contact lens having a layered structural configuration: a lower water content silicone hydrogel core (or bulk material) completely covered with a layer of a higher water content hydrogel totally or substantially free of silicone. A hydrated silicone hydrogel contact lens of the invention possesses high oxygen permeability for maintaining the corneal health and a soft, water-rich, lubricious surface for wearing comfort.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: June 21, 2022
    Assignee: Alcon Inc.
    Inventors: Yongxing Qiu, John Dallas Pruitt, Sibichen J. Thekveli, Robert Carey Tucker, Jared Nelson
  • Publication number: 20220137263
    Abstract: The invention is related to contact lenses that not only comprise the much desired water gradient structural configurations, but also have a minimized uptakes of polycationic antimicrobials and a long-lasting surface hydrophilicity and wettability even after going through a 30-days lens care regime. Because of the water gradient structural configuration and a relatively-thick, extremely-soft and water-rich hydrogel surface layer, a contact lens of the invention can provide superior wearing comfort. Further, a contact lens of the invention is compatible with multipurpose lens care solutions present in the market and can endure the harsh lens care handling conditions (e.g., digital rubbings, accidental inversion of contact lenses, etc.) encountered in a daily lens care regime. As such, they are suitable to be used as weekly- or monthly-disposable water gradient contact lenses.
    Type: Application
    Filed: January 11, 2022
    Publication date: May 5, 2022
    Inventors: Yongxing Qiu, John Dallas Pruitt, Newton T. Samuel, Chung-Yuan Chiang, Robert Carey Tucker, Yuan Chang, Ethan Leveillee
  • Patent number: 11256003
    Abstract: The invention is related to contact lenses that not only comprise the much desired water gradient structural configurations, but also have a minimized uptakes of polycationic antimicrobials and a long-lasting surface hydrophilicity and wettability even after going through a 30-days lens care regime. Because of the water gradient structural configuration and a relatively-thick, extremely-soft and water-rich hydrogel surface layer, a contact lens of the invention can provide superior wearing comfort. Further, a contact lens of the invention is compatible with multipurpose lens care solutions present in the market and can endure the harsh lens care handling conditions (e.g., digital rubbings, accidental inversion of contact lenses, etc.) encountered in a daily lens care regime. As such, they are suitable to be used as weekly- or monthly-disposable water gradient contact lenses.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: February 22, 2022
    Assignee: Alcon Inc.
    Inventors: Yongxing Qiu, John Dallas Pruitt, Newton T. Samuel, Chung-Yuan Chiang, Robert Carey Tucker, Yuan Chang, Ethan Leveillee
  • Publication number: 20220032564
    Abstract: The invention is related to a coated contact lens, especially a coated silicone hydrogel contact lens, which comprises an anterior surface, an opposite posterior surface, and a layered structural configuration from the anterior surface to the posterior surface. The layered structural configuration comprises an outer anterior surface hydrogel layer, an inner layer, and an outer posterior surface hydrogel layer. The inner layer is a lens bulk material. The coated contact lens has a superior lens surface softness and a good lens surface hydrophilicity while optionally having a desirably-lower polyquaternium-1 uptake.
    Type: Application
    Filed: July 27, 2021
    Publication date: February 3, 2022
    Inventors: Yongxing Qiu, John Dallas Pruitt, Ciara Dauenhauer, Chung-Yuan Chiang, Paul William Oyler, Robert Carey Tucker
  • Patent number: 11029447
    Abstract: The invention is related to a process for producing contact lenses that not only comprise a water gradient structural configurations, but also have a minimized uptakes of polyquaternium-1 and a long-lasting surface hydrophilicity and wettability even after being undergone a simulated 30-days lens care regime.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: June 8, 2021
    Assignee: Alcon Inc.
    Inventors: Yongxing Qiu, John Dallas Pruitt, Newton T. Samuel, Chung-Yuan Chiang, Angela Driver-Scott, Ciara Dauenhauer, Rita Anand
  • Patent number: 11029446
    Abstract: The invention is related to a process for producing contact lenses that not only comprise a water gradient structural configurations, but also have a minimized uptakes of polyquaternium-1 and a long-lasting surface hydrophilicity and wettability even after being undergone a 30-days lens care regime.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: June 8, 2021
    Assignee: Alcon Inc.
    Inventors: Yongxing Qiu, John Dallas Pruitt, Newton T. Samuel
  • Publication number: 20210129467
    Abstract: The invention relates to a soft hydrogel contact lens, especially a silicone hydrogel contact lens, which has a capability of delivering a hydrophobic comfort agent into the eye of a wearer. The hydrophobic comfort agent includes without limitation a monoglyceride, a diglyceride, a triglyceride, a glycolipid, a glyceroglycolipid, a sphingolipid, a sphingo-glycolipid, a phospholipid, a fatty acid, a fatty alcohol, a hydrocarbon having a C12-C28 chain in length, a mineral oil, a silicone oil, or a mixture thereof. It can be released from the soft hydrogel contact lens into the eye of a wearer when being worn so as to strengthen and stabilize the tear film lipid layer and alleviate the dryness of the eye.
    Type: Application
    Filed: January 6, 2021
    Publication date: May 6, 2021
    Inventors: John Dallas Pruitt, Lynn Cook Winterton, Jared Nelson
  • Publication number: 20210130648
    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.
    Type: Application
    Filed: January 11, 2021
    Publication date: May 6, 2021
    Inventors: Yongxing Qiu, Newton T. Samuel, John Dallas Pruitt, Chandana Kolluru, Arturo Norberto Medina, Lynn Cook Winterton, Daqing Wu, Xinming Qian, Jared Nelson
  • Publication number: 20210130644
    Abstract: The invention is related to a class of hydrophilic poly(meth)acrylamide-based copolymers each comprising dangling (i.e., pendant) reactive chains each terminated with a carboxyl group groups and at least 50% by mole of (meth)acrylamide repeating units relative to all repeating units of the hydrophilic poly(meth)acrylamide-based copolymer. The hydrophilic copolymers have a relatively high affinity to a base coating of a polyanionic polymer on a medical device or contact lens and are highly reactive towards azetidinium groups of an azetidinium-containing polymer upon heating. They can find particular use in producing water-soluble highly-branched hydrophilic polymeric material and in producing water gradient contact lenses.
    Type: Application
    Filed: January 13, 2021
    Publication date: May 6, 2021
    Inventors: Frank Chang, Feng Jing, Troy Vernon Holland, Chung-Yuan Chiang, John Dallas Pruitt
  • Patent number: 10920099
    Abstract: The invention is related to a class of hydrophilic poly(meth)acrylamide-based copolymers each comprising dangling (i.e., pendant) reactive chains each terminated with a carboxyl group groups and at least 50% by mole of (meth)acrylamide repeating units relative to all repeating units of the hydrophilic poly(meth)acrylamide-based copolymer. The hydrophilic copolymers have a relatively high affinity to a base coating of a polyanionic polymer on a medical device or contact lens and are highly reactive towards azetidinium groups of an azetidinium-containing polymer upon heating. They can find particular use in producing water-soluble highly-branched hydrophilic polymeric material and in producing water gradient contact lenses.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: February 16, 2021
    Assignee: Alcon Inc.
    Inventors: Frank Chang, Feng Jing, Troy Vernon Holland, Chung-Yuan Chiang, John Dallas Pruitt
  • Patent number: 10920102
    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.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: February 16, 2021
    Assignee: Alcon Inc.
    Inventors: Yongxing Qiu, Newton T. Samuel, John Dallas Pruitt, Chandana Kolluru, Arturo Norberto Medina, Lynn Cook Winterton, Daqing Wu, Xinming Qian, Jared Nelson
  • Patent number: 10913224
    Abstract: The invention relates to a soft hydrogel contact lens, especially a silicone hydrogel contact lens, which has a capability of delivering a hydrophobic comfort agent into the eye of a wearer. The hydrophobic comfort agent includes without limitation a monoglyceride, a diglyceride, a triglyceride, a glycolipid, a glyceroglycolipid, a sphingolipid, a sphingo-glycolipid, a phospholipid, a fatty acid, a fatty alcohol, a hydrocarbon having a C12-C28 chain in length, a mineral oil, a silicone oil, or a mixture thereof. It can be released from the soft hydrogel contact lens into the eye of a wearer when being worn so as to strengthen and stabilize the tear film lipid layer and alleviate the dryness of the eye.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: February 9, 2021
    Assignee: Alcon Inc.
    Inventors: John Dallas Pruitt, Lynn Cook Winterton, Jared Nelson
  • Patent number: 10830923
    Abstract: The invention is related to a process for producing contact lenses that not only comprise a water gradient structural configurations, but also have a minimized uptakes of polyquaternium-1 and a long-lasting surface hydrophilicity and wettability even after being undergone a simulated 30-days lens care regime.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: November 10, 2020
    Assignee: Alcon Inc.
    Inventors: Yongxing Qiu, Kasey Jon Minick, John Dallas Pruitt, Newton T. Samuel, Chung-Yuan Chiang, Kelly Kayi Tallau, Matthew McCollum, Richard Govan
  • Patent number: 10823983
    Abstract: Described herein are water-soluble UV-absorbing vinylic monomers and their uses in preparing UV-absorbing contact lenses capable of blocking ultra-violet (“UV”) radiation and optionally (but preferably) violet radiation with wavelengths from 380 nm to 440 nm, thereby protecting eyes to some extent from damages caused by UV radiation and potentially from violet radiation. This invention also provides a UV-absorbing contact lens.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: November 3, 2020
    Assignee: Alcon Inc.
    Inventors: Frank Chang, Ryan DeSousa, Troy Vernon Holland, John Dallas Pruitt, Jared Nelson
  • Publication number: 20200339836
    Abstract: The invention is related to a hydrated silicone hydrogel contact lens having a layered structural configuration: a lower water content silicone hydrogel core (or bulk material) completely covered with a layer of a higher water content hydrogel totally or substantially free of silicone. A hydrated silicone hydrogel contact lens of the invention possesses high oxygen permeability for maintaining the corneal health and a soft, water-rich, lubricious surface for wearing comfort.
    Type: Application
    Filed: July 9, 2020
    Publication date: October 29, 2020
    Inventors: Yongxing Qiu, John Dallas Pruitt, Sibichen J. Thekveli, Robert Carey Tucker, Jared Nelson