Patents by Inventor Hae-Seung Lee

Hae-Seung Lee 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).

  • FUNCTIONALIZED ISOBUTYLENE-ISOPRENE COPOLYMER COMPOSITION
    Publication number: 20150175829
    Abstract: A siloxane-functional isobutylene copolymer and use thereof is described. The copolymer is of the formula: <Please insert the chemical formula here as it appears in the paper copy.> wherein a is at least 20, and at least one of b and c are at least one, X is oxygen or nitrogen; R1 is a covalent bond or a divalent (hetero)hydrocarbyl group; Sil is a polydialkylsiloxane; and x is 1 or 2.
    Type: Application
    Filed: June 17, 2013
    Publication date: June 25, 2015
    Inventors: Hae-Seung Lee, Babu N. Gaddam, Robert A. Asmus, Steven D. Theiss
  • ADHESIVES COMPRISING GRAFTED ISOBUTYLENE COPOLYMER
    Publication number: 20150166854
    Abstract: An adhesive composition is described comprising a tackifier and at least one grafted isobutylene copolymer. The grafted isobutylene copolymer has the formula: R1—(R2—Z) wherein R1 represents an isobutylene copolymer, R2 is a covalent bond or multivalent alkylene or arylene, and Z is a grafted polymer. Z is typically a homopolymer of copolymer comprising alkene repeat units, aralkylene repeat units, or a combination thereof. Also described are adhesive coated articles, methods of making adhesive coated articles, and grafted isobutylene polymers.
    Type: Application
    Filed: August 12, 2013
    Publication date: June 18, 2015
    Inventors: Hae-Seung Lee, Jonathan E. Janoski, Joon Chatterjee, Kevin M. Lewandowski, Babu N. Gaddam
  • ADHESIVES COMPRISING REACTION PRODUCT OF HALOGENATED POLY(ISOBUTYLENE) COPOLYMERS AND POLYAMINES
    Publication number: 20150072143
    Abstract: Adhesive composition are described comprising the reaction product of at least one halogenated copolymer of isobutylene wherein halogen atoms of the copolymer are replaced by a polyamine having a melting point greater than 25° C., thereby crosslinking the copolymer. The isobutylene copolymer comprises halogenated repeat units derived from isoprene, butadiene, para-alkyl styrene, or a combination thereof. The adhesive composition comprises a copolymer of isobutylene repeat units and second repeat units selected from alkene repeat units, para-methyl styrene repeat units, or a combination thereof wherein at least a portion of the second repeat units are directly bonded to one another with a polyamine crosslinker having a melting point greater than 25° C. Also described are adhesive articles, such as tapes, comprising such adhesives.
    Type: Application
    Filed: February 6, 2013
    Publication date: March 12, 2015
    Inventors: Hae-Seung Lee, Pierre R. Bieber, Joon Chatterjee, Siegfried R. Goeb, Babu N. Gaddam
  • ADHESIVES COMPRISING POLY(ISOBUTYLENE) COPOLYMERS COMPRISING PENDENT FREE-RADICALLY POLYMERIZABLE QUATERNARY AMMONIUM SUBSTITUENT
    Publication number: 20150010752
    Abstract: Adhesive compositions comprising a copolymer of isobutylene repeat units and alkene repeat units are described. At least a portion of the alkene repeat units are bonded to a pendent nitrogen atom of a quaternary ammonium salt comprising a free-radically polymerizable substituent. The adhesive optionally comprises other components such as tackifier, unfunctionalized polyisobutylene polymer, plasticizer, and combinations thereof.
    Type: Application
    Filed: January 30, 2013
    Publication date: January 8, 2015
    Inventors: Hae-Seung Lee, Joon Chatterjee, Babu N. Gaddam
  • Passive offset and overshoot cancellation for sampled data circuits
    Patent number: 8912838
    Abstract: A zero-crossing detector with effective offset cancellation includes a set of series connected capacitors and an amplifier having an input terminal. An offset capacitor is operatively connected between the amplifier and the set of series connected capacitors. A switch is operatively connected to the input terminal, and an offset sampling capacitor is operatively connected to the switch. The switch connects the offset sampling capacitor to the input terminal of the amplifier during a charge transfer phase.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: December 16, 2014
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Hae-Seung Lee
  • Constant slope ramp circuits for sampled-data circuits
    Patent number: 8854092
    Abstract: A circuit includes a level-crossing detector to generate a level-crossing detection signal when an input signal crosses a predetermined voltage level. A first stage set of capacitors is operatively coupled to the level-crossing detector. A ramp circuit is operatively coupled to the set of series-connected capacitors. A second stage set of capacitors is operatively coupled to the first stage set of capacitors and the ramp circuit. The ramp circuit includes a feedback capacitor and a preset switch to provide a linear ramp output.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: October 7, 2014
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Hae-Seung Lee
  • Buffer Amplifier Circuit
    Publication number: 20140266845
    Abstract: Amplifier circuits implemented with a buffer amplifier with a voltage gain substantially equal to one. In one example, a continuous-time amplifier is implemented by applying the input source across the input and the output terminals of the buffer amplifier. In another example, a discrete-time amplifier is implemented. During the sampling phase at least one input voltage is sampled, and during the transfer phase at least one capacitor is coupled across the input and the output terminals of a buffer amplifier to effectuate an amplification.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Inventor: Hae-Seung Lee
  • CONFORMABLE COATING AND COMPOSITION
    Publication number: 20140235712
    Abstract: The disclosed conformable coating provides a highly durable and resilient film useful for protecting and repairing surfaces such as skin and mucous membranes. A conformable coating composition comprises an elastomer, a volatile liquid, wherein the volatile liquid is at least 40% wt. of the total composition and the composition has a viscosity less than 1,000 cps. Disclosed is a conformable film that comprises an elastomer on a substrate, wherein the coating weight is from 1 to 30 mg/in2, and wherein the film has less than 75% failure at 100% elongation.
    Type: Application
    Filed: September 28, 2012
    Publication date: August 21, 2014
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Robert A. Asmus, Hae-Seung Lee, John D. Dell, Deena M. Conrad-Vlasak
  • CONFORMABLE COATING AND COMPOSITION
    Publication number: 20140228475
    Abstract: The disclosed conformable coating provides a highly durable and resilient film useful for protecting and repairing surfaces such as skin and mucous membranes. The coating comprises 0.1% to 65% wt. of a polymerized cyanoacrylate monomer and at least 35% wt. of an elastomer phase. The conformable coating composition comprises a polymerizable cyanoacrylate monomer, an elastomer, and a volatile liquid. The cyanoacrylate monomer is 0.1 to 65% wt. of the nonvolatile portion, the elastomer in an elastomer phase is at least 35% wt. of the nonvolatile portion, and the volatile liquid is at least 40% wt. of the total composition.
    Type: Application
    Filed: September 28, 2012
    Publication date: August 14, 2014
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Robert A. Asmus, Hae-seung Lee, John D. Dell, Deeda M. Conrad-Vlasak
  • Multi-step ADC with sub-ADC calibration
    Patent number: 8723706
    Abstract: Various embodiments of the invention allow for error calibration in analog-to-digital converters (ADCs) having multiple cascaded ADC stages. The ADC stages exchange information that is utilized in the calibration process. Various embodiments allow for calibration of one stage by utilizing a feedback signal from at least one subsequent stage. Certain embodiments of the invention increase the speed of the calibration process by utilizing coarse and fine sub-ADCs.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: May 13, 2014
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Soonkyun Shin, Dong-Young Chang, Matthew A. Z. Straayer, Hae-Seung Lee
  • UV curable anhydride-modified poly(isobutylene)
    Patent number: 8673996
    Abstract: An adhesive (co)polymers comprising: a) an isobutylene copolymer having pendent anhydride groups, b) a polyamine photobase generator and c) optionally a tackifier is described.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: March 18, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Hae-Seung Lee, Joon Chatterjee, Gregg A. Caldwell, Babu N. Gaddam
  • Radiation curable poly(isobutylene) adhesive copolymers having pendent amine groups
    Patent number: 8673995
    Abstract: The disclosure provides pressure-sensitive adhesives and adhesive sealants prepared from amine-modified, crosslinked isobutylene copolymers, and tape articles prepared therefrom.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: March 18, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Joon Chatterjee, Hae-Seung Lee, Babu N. Gaddam
  • Curable cyclic anhydride copolymer/silicone composition
    Patent number: 8653190
    Abstract: Disclosed is a curable silicone composition for preparing release layers and pressure sensitive adhesives, and to substrates bearing a layer of the cured composition. More specifically, this invention relates to a silicone composition, curable in the absence of both catalysts and actinic radiation comprising a cyclic anhydride copolymer and an amine-terminated polysiloxane.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: February 18, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Joon Chatterjee, Timothy D. Filiatrault, Hae-Seung Lee, David S. Hays, Naimul Karim, Babu N. Gaddam
  • Passive offset and overshoot cancellation for sampled-data circuits
    Patent number: 8643424
    Abstract: A zero-crossing detector with effective offset cancellation includes a set of series connected capacitors and an amplifier having an input terminal. An offset capacitor is operatively connected between the amplifier and the set of series connected capacitors. A switch is operatively connected to the input terminal, and an offset sampling capacitor is operatively connected to the switch. The switch connects the offset sampling capacitor to the input terminal of the amplifier during a charge transfer phase.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: February 4, 2014
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Hae-Seung Lee
  • Moisture curable isobutylene adhesive copolymers
    Patent number: 8629209
    Abstract: The disclose provides pressure-sensitive adhesives and adhesive sealants prepared from alkoxysilane modified, crosslinked isobutylene copolymers, and tape articles prepared therefrom.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: January 14, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Hae-Seung Lee, Joon Chatterjee, Babu N. Gaddam, Gregg A. Caldwell
  • Radiation curable poly(isobutylene) adhesive copolymers
    Patent number: 8597784
    Abstract: The disclose provides pressure-sensitive adhesives and adhesive sealants prepared from modified, crosslinked isobutylene copolymers, and tape articles prepared therefrom.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: December 3, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Hae-Seung Lee, Guy D. Joly, Joon Chatterjee, Marie Aloshyna ep Lesuffleur, Jay M. Jennen, Jingjing Ma, Gregg A. Caldwell, Babu N. Gaddam, Larry R. Krepski
  • Passive Offset and Overshoot Cancellation for Sampled-Data Circuits
    Publication number: 20130300488
    Abstract: A zero-crossing detector with effective offset cancellation includes a set of series connected capacitors and an amplifier having an input terminal. An offset capacitor is operatively connected between the amplifier and the set of series connected capacitors. A switch is operatively connected to the input terminal, and an offset sampling capacitor is operatively connected to the switch. The switch connects the offset sampling capacitor to the input terminal of the amplifier during a charge transfer phase.
    Type: Application
    Filed: November 5, 2012
    Publication date: November 14, 2013
    Inventor: Hae-Seung Lee
  • CONSTANT SLOPE RAMP CIRCUITS FOR SAMPLED-DATA CIRCUITS
    Publication number: 20130285469
    Abstract: A circuit includes a level-crossing detector to generate a level-crossing detection signal when an input signal crosses a predetermined voltage level. A first stage set of capacitors is operatively coupled to the level-crossing detector. A ramp circuit is operatively coupled to the set of series-connected capacitors. A second stage set of capacitors is operatively coupled to the first stage set of capacitors and the ramp circuit. The ramp circuit includes a feedback capacitor and a preset switch to provide a linear ramp output.
    Type: Application
    Filed: October 22, 2012
    Publication date: October 31, 2013
    Inventor: Hae-Seung Lee
  • System and method for background calibration of time interleaved analog to digital converters
    Patent number: 8519875
    Abstract: Various embodiments allow for background calibration of channel-to-channel mismatch errors. In certain embodiments calibration is accomplished by comparing the output of I-ADCs against the output of a reference ADC and correlating the difference to a known function to obtain a correction signal that can be used to correct channel-to-channel mismatch errors.
    Type: Grant
    Filed: April 10, 2012
    Date of Patent: August 27, 2013
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Matthew Allen Zornig Straayer, Hae-Seung Lee
  • Offset cancellation for sampled-data circuits
    Patent number: 8519769
    Abstract: A comparator based circuit with effective offset cancellation includes first and second amplifiers and an offset capacitor operatively connected to the first and second amplifiers. An offset voltage source generates an offset voltage. A first switch connects the offset voltage source to ground during a first time period. The first amplifier generates an output voltage in response to the first switch connecting the offset voltage source to ground during the first time period. A second switch connects the offset capacitor to ground during a second time period. The first switch disconnects the offset voltage source from ground during a third time period, and the second switch disconnects the offset capacitor from ground during the third time period.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: August 27, 2013
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Hae-Seung Lee