Patents by Inventor Frank Chang

Frank Chang 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).

  • Silicone hydrogel lenses with relatively-long thermal stability
    Patent number: 9568645
    Abstract: The invention provides silicone hydrogel ophthalmic lenses (in particular contact lenses) having relatively-long thermal stability and methods for making such ophthalmic lenses.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: February 14, 2017
    Assignee: Novartis AG
    Inventors: Frank Chang, Jinyu Huang, Ryan DeSousa
  • Amphiphilic siloxane-containing vinylic monomers and uses thereof
    Patent number: 9541676
    Abstract: The invention provides an amphiphilic siloxane-containing vinylic monomer which comprises one sole ethylenically unsaturated group and a siloxane-containing group covalently linked to the ethylenically-unsaturated group through a hydrophilic linker. The present invention is also related to a polymer, an actinically-crosslinkable silicone-containing prepolymer, a silicone hydrogel polymeric material, or a silicone hydrogel contact lens, which comprises monomeric units derived from an amphiphilic siloxane-containing vinylic monomer of the invention. In addition, the invention provides a method for making silicone hydrogel contact lenses using a water-based lens-forming formulation comprising an amphiphilic siloxane-containing vinylic monomer of the invention and/or an actinically-crosslinkable silicone-containing prepolymer of the invention.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: January 10, 2017
    Assignee: Novartis AG
    Inventor: Frank Chang
  • TRIS(TRIMETHYL SILOXY)SILANE VINYLIC MONOMERS AND USES THEREOF
    Publication number: 20170002029
    Abstract: The invention provides a TRIS-containing vinylic monomer which comprises one sole (meth)acryloyloxy group and a tris(trimethylsiloxy)silyl group covalently linked to the ethylenically-unsaturated group through a polyoxyethylene linker. The present invention is also related to a polymer, an actinically-crosslinkable silicone-containing prepolymer, a silicone hydrogel polymeric material, or a silicone hydrogel contact lens, which comprises monomeric units derived from a TRIS-containing vinylic monomer of the invention. In addition, the invention provides a method for making a TRIS-containing vinylic monomer of the invention.
    Type: Application
    Filed: September 14, 2016
    Publication date: January 5, 2017
    Inventors: Frank Chang, Mamoru Hagiwara, Shoji Ichinohe
  • VISIBLE-LIGHT PHOTOINITIATORS AND USES THEREOF
    Publication number: 20160357031
    Abstract: Described herein are acyl germanium photoinitiator for cost-effective and time-efficient method for producing 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 method for making UV-absorbing contact lenses made by using an acyl germanium photoinitiator of the invention.
    Type: Application
    Filed: May 31, 2016
    Publication date: December 8, 2016
    Inventors: Troy Vernon Holland, Frank Chang, Ryan DeSousa
  • Actinically-crosslinkable amphiphilic prepolymers
    Patent number: 9500775
    Abstract: The invention provide a class of actinically-crosslinkable amphiphilic prepolymers which comprise at least one polysiloxane segment, at least one polyoxazoline segment, and two terminal ene groups. The present invention is also related to a medical device comprising a silicone hydrogel material obtained from step-growth polymerization of a polymerizable material comprising a prepolymer of the invention and to a method for producing contact lenses from a prepolymer of the invention.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: November 22, 2016
    Assignee: Novartis AG
    Inventors: Frank Chang, Venkat Shankar
  • AZETIDINIUM-CONTAINING COPOLYMERS AND USES THEREOF
    Publication number: 20160326395
    Abstract: The invention is related to azetidinium-containing copolymers and vinylic monomers and their uses in formation of non-silicone hydrogel coatings on silicone hydrogel contact lenses.
    Type: Application
    Filed: July 21, 2016
    Publication date: November 10, 2016
    Inventors: Troy Vernon Holland, Frank Chang, Yongxing Qiu, John Dallas Pruitt, Chung-Yuan Chiang, Venkat Shankar, Robert Scott, Yash Kapoor
  • Phase synchronization of modulation or demodulation for QAM-based multiband TSV-link
    Patent number: 9491028
    Abstract: A chip-to-chip communications circuit which is particularly well-suited for short range wired RF communication from one integrated circuit (chip) to another is presented. The circuits preferably utilize multi-frequency quadrature amplitude modulation (QAM) mechanisms for converting digital data bits from a parallel form into a serial analog stream for communication over a chip I/O connection. During a phase calibration cycle, a phase adjustment controller in the transmitter interoperates with a phase adjustment controller in the receiver, to adjust a phase locked-loop (PLL) circuit to correct for the phase delay arising in response to signal propagation between transmitter and receiver.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: November 8, 2016
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Sheau Jiung Lee, Yilei Li, Wei-Han Cho, Mau-Chung Frank Chang
  • WIRELESS WEARABLE BIG DATA BRAIN MACHINE INTERFACE
    Publication number: 20160323000
    Abstract: A wireless wearable high data throughput (big data) brain machine interface apparatus is presented. An implanted recording and transmitting module collects neural data from a plurality of implanted electrodes and wirelessly transmits this over a short distance to a wearable (not implanted) receiving and forwarding module, which communicates the data over a wired communication to a mobile post processing device. The post processing device can send this neural data to an external display or computer enabled device for viewing and/or manipulation. High data throughput is supported by aggregating multiple groups of electrodes by multiple n-channel recording elements, which are multiplexed and then modulated into high frequency wireless communications to the wearable module. Embodiments include use of multiple radiators (multiple polarizations and/or spatially distributed), with beam alignment adjustment.
    Type: Application
    Filed: June 8, 2016
    Publication date: November 3, 2016
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Wentai Liu, Mau-Chung Frank Chang, Yen-Cheng Kuan, Yi-Kai Los, Yan Zhao
  • Tris(trimethyl siloxyl)silane vinylic monomers and uses thereof
    Patent number: 9475827
    Abstract: The invention provides a TRIS-containing vinylic monomer which comprises one sole (meth)acryloyloxy group and a tris(trimethylsiloxy)silyl group covalently linked to the ethylenically-unsaturated group through a polyoxyethylene linker. The present invention is also related to a polymer, an actinically-crosslinkable silicone-containing prepolymer, a silicone hydrogel polymeric material, or a silicone hydrogel contact lens, which comprises monomeric units derived from a TRIS-containing vinylic monomer of the invention. In addition, the invention provides a method for making a TRIS-containing vinylic monomer of the invention.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: October 25, 2016
    Assignees: SHIN-ETSU CHEMICAL COMPANY, LTD., NOVARTIS AG
    Inventors: Frank Chang, Mamoru Hagiwara, Shoji Ichinohe
  • COMPOSITIONS OF AND METHODS FOR USING HYDRAULIC FRACTURING FLUID FOR PETROLEUM PRODUCTION
    Publication number: 20160289543
    Abstract: A hydraulic fracturing fluid for use in oilfield applications is disclosed. The hydraulic fracturing fluid includes a spherical bead-forming liquid composition, the spherical bead-forming liquid composition comprising a micellar forming surfactant, a bead-forming compound, a non-solids bearing liquid solvent, a pH control agent, and a curing agent.
    Type: Application
    Filed: June 7, 2016
    Publication date: October 6, 2016
    Applicants: Saudi Arabian Oil Company, Oil Chem Technologies
    Inventors: Fakuen Frank Chang, Paul D. Berger, Christie H. Lee
  • Self track scheme for multi frequency band serializer de-serializer I/O circuits
    Patent number: 9426016
    Abstract: A serializer and de-serializer circuit having self tracking circuitry which is particularly well-suited for use in communicating digital data from one integrated circuit (chip) to another for implementing chip-to-chip communications is presented. The circuits are scalable and utilize a multi-frequency modulation mechanism (e.g., QAM) for converting digital data bits into a serial analog stream at multiple frequencies for communication over a chip I/O connection. The track pulse generated on the transmitter side is serialized through the same path as the data, and demodulated through the same path in the de-serializer to provide synchronization with the data, without the need for complicated base band processing.
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: August 23, 2016
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Sheau Jiung Lee, Mau-Chung Frank Chang, Yanghyo Kim
  • Azetidinium-containing copolymers and uses thereof
    Patent number: 9422447
    Abstract: The invention is related to azetidinium-containing copolymers and vinylic monomers and their uses in formation of non-silicone hydrogel coatings on silicone hydrogel contact lenses.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: August 23, 2016
    Assignee: Novartis AG
    Inventors: Troy Vernon Holland, Frank Chang, Yongxing Qiu, John Dallas Pruitt, Chung-Yuan Chiang, Manivakkam J. Shankernarayanan, Robert Scott, Yash Kapoor
  • Scalable serial/de-serial I/O for chip-to-chip connection based on multi-frequency QAM scheme
    Patent number: 9369318
    Abstract: A serializer and de-serializer circuit which is particularly well-suited for use in communicating digital data from one integrated circuit (chip) to another for implementing chip-to-chip communications is presented. The circuits are scalable and utilize a multi-frequency quadrature amplitude modulation (QAM) mechanism for converting digital data bits from a parallel form into a serial analog stream for communication over a chip I/O connection. The serializer has multiple digital-to-analog converters (DACs) whose outputs are directed to QAM mixer inputs, within QAMs at multiple frequencies, whose outputs are summed into a single analog signal for communication over an I/O connection. The de-serializer amplifies the analog signal which is received by QAM mixers at different frequencies, whose outputs are low pass filtered and converted back to parallel digital data bits.
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: June 14, 2016
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Sheau Jiung Lee, Mau-Chung Frank Chang, Yanghyo Kim
  • Low jitter tunable voltage control oscillator with self calibration circuits to reduce chip fabrication process variation
    Patent number: 9356582
    Abstract: A voltage controlled oscillator (VCO) which can be configured with a smaller tuning range than is ordinarily required is presented. Ordinarily, the tuning range is selected much broader than the application warrants so that sufficient range is still provided despite VCO process variations. The inventive VCO is able to substantially eliminate the effects of process variation by utilizing a calibration circuit and process, so that variation in VCO device operation is minimized despite substantial process variation. Accordingly, the inventive VCO device is subject to reduced levels of jitter as its range need not be utilized for overcoming process variation arising during device fabrication.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: May 31, 2016
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Sheau Jiung Lee, Yilei Li, Gabriel Virbila, Mau-Chung Frank Chang
  • PHASE SYNCHRONIZATION OF MODULATION OR DEMODULATION FOR QAM-BASED MULTIBAND TSV-LINK
    Publication number: 20160149746
    Abstract: A chip-to-chip communications circuit which is particularly well-suited for short range wired RF communication from one integrated circuit (chip) to another is presented. The circuits preferably utilize multi-frequency quadrature amplitude modulation (QAM) mechanisms for converting digital data bits from a parallel form into a serial analog stream for communication over a chip I/O connection. During a phase calibration cycle, a phase adjustment controller in the transmitter interoperates with a phase adjustment controller in the receiver, to adjust a phase locked-loop (PLL) circuit to correct for the phase delay arising in response to signal propagation between transmitter and receiver.
    Type: Application
    Filed: November 23, 2015
    Publication date: May 26, 2016
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Sheau Jiung Lee, Yilei Li, Wei-Han Ho, Mau-Chung Frank Chang
  • COMPOSITIONS OF AND METHODS FOR USING HYDRAULIC FRACTURING FLUID FOR PETROLEUM PRODUCTION
    Publication number: 20160137910
    Abstract: A hydraulic fracturing fluid for use in oilfield applications is disclosed, the hydraulic fracturing fluid includes a spherical bead-forming liquid composition, the spherical bead-forming liquid composition comprised of a primary liquid precursor and a secondary liquid precursor, the primary liquid precursor comprises a micellar forming surfactant, a bead-forming compound, and a non-solids bearing liquid solvent; and the secondary liquid precursor comprises one or more curing agents, and one or more co-curing agents.
    Type: Application
    Filed: November 17, 2015
    Publication date: May 19, 2016
    Applicants: Saudi Arabian Oil Company, Oil Chem Technologies
    Inventors: Fakuen Frank Chang, Paul D. Berger, Christie H. Lee, Susanta Mohapatra
  • Sub-carrier successive approximation millimeter wave radar for high-accuracy 3D imaging
    Patent number: 9341710
    Abstract: A sub-carrier successive approximation (SCSA) radar having a sufficiently high accuracy to capture 3D images of concealed objects. The invention is phase-based, and directly measures round trip time by estimating the phase delay of the carrier. One of its advantages is that the carrier does not need to sweep across a wide frequency range, thereby relaxing RF front-end bandwidth and linearity requirements. SCSA radar accuracy is limited only by the extent of system noise, allowing very high accuracy to be achieved with a sufficient integration period. The SCSA radar can be readily implemented in CMOS, as well as other device technologies, and fabricated within one or more small integrated circuits.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: May 17, 2016
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Mau-Chung Frank Chang, Adrian J. Tang
  • Amphiphilic polysiloxane prepolymers and uses thereof
    Patent number: 9341744
    Abstract: The present invention provides an amphiphilic polysiloxane prepolymer which comprises hydrophilic monomeric units derived from at least one hydrophilic vinylic monomer, polysiloxane crosslinking units derived from at least one polysiloxane crosslinker having at least two terminal ethylenically-unsaturated groups, dangling polysiloxane chains each of which is terminated with one ethylenically unsaturated group, and chain-transfer units derived from a chain transfer agent other than a RAFT agent. A prepolymer of the invention is suitable for making hydrogel contact lenses. The present invention is also related to hydrogel contact lenses made from an amphiphilic polysiloxane prepolymer of the invention and to processes for preparing an amphiphilic polysiloxane prepolymer of the invention and for making silicone hydrogel contact lenses.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: May 17, 2016
    Assignee: Novartis AG
    Inventors: Frank Chang, Robert Scott, Jinyu Huang, Arturo N. Medina, Dawn A. Smith, Laura A. Sanders, John Dallas Pruitt
  • DIFFERENTIAL CURRENT MODE LOW LATENCY MODULATION AND DEMODULATION FOR CHIP-TO-CHIP CONNECTION
    Publication number: 20160134460
    Abstract: A chip-to-chip communications circuit which is particularly well-suited for short range communication (less than a few inches) from one integrated circuit (chip) to another is presented. The circuits preferably utilize multi-frequency quadrature amplitude modulation (QAM) mechanisms for converting digital data bits from a parallel form into a serial analog stream for communication over a chip I/O connection. Differential current mode modulation in the transmitter, and demodulation in the receiver, are utilized which reduce latency and power-consumption while increasing manufacturing yields and resilience to process variations.
    Type: Application
    Filed: November 6, 2015
    Publication date: May 12, 2016
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Sheau Jiung Lee, Mau-Chung Frank Chang, Wei-Han Cho, Yanghyo Kim
  • Carbosiloxane vinylic monomers
    Patent number: 9329306
    Abstract: The invention provides a carbosiloxane vinylic monomer which comprises one sole ethylenically unsaturated group, one sole terminal butyl group; and one oligo(carbosiloxane)-containing linkage between the ethylenically unsaturated terminal group and the terminal butyl group. The present invention is also related to a polymer, an actinically-crosslinkable silicone-containing prepolymer, a silicone hydrogel polymeric material, or a silicone hydrogel contact lens, which comprises monomeric units derived from a carbosiloxane vinylic monomer of the invention.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: May 3, 2016
    Assignee: Novartis AG
    Inventors: Jinyu Huang, Frank Chang