Patents by Inventor Kee Lee

Kee 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).

  • Patent number: 10555753
    Abstract: The present invention provides an atherectomy catheter which has a cutting element that is able to cut both soft tissue and hard tissue, and methods of cutting material from a blood vessel lumen using a rotating cutting element. The cutting element has a sharp cutting edge that surrounds a cup-shaped surface and at least one surface of abrasive material. The cup-shaped surface directs the cut material into a tissue chamber. The cutting edge and the cup-shaped surface together are well suited to cut and remove relatively soft tissue from the blood vessel. The abrasive material surface in combination with the cutting element is well suited to abrade and remove hard material from the blood vessel.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: February 11, 2020
    Inventors: John Robert Moberg, Alex Yang, Christopher B. Brodeur, William Joseph Whealon, Kee Lee, Phyllis Yuen, Darren Doud
  • Patent number: 10219824
    Abstract: A catheter is provided, which includes a cutting element having one or more raised elements. The cutting element has a cup-shaped surface at the distal end that may be smooth and continuous except for the raised elements.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: March 5, 2019
    Inventors: Kee Lee, Phyllis Yuen, Darren Doud
  • Publication number: 20170265888
    Abstract: The present invention provides an atherectomy catheter which has a cutting element that is able to cut both soft tissue and hard tissue, and methods of cutting material from a blood vessel lumen using a rotating cutting element. The cutting element has a sharp cutting edge that surrounds a cup-shaped surface and at least one surface of abrasive material. The cup-shaped surface directs the cut material into a tissue chamber. The cutting edge and the cup-shaped surface together are well suited to cut and remove relatively soft tissue from the blood vessel. The abrasive material surface in combination with the cutting element is well suited to abrade and remove hard material from the blood vessel.
    Type: Application
    Filed: May 19, 2017
    Publication date: September 21, 2017
    Inventors: John Robert Moberg, Alex Yang, Christopher B. Brodeur, William Joseph Whealon, Kee Lee, Phyllis Yuen, Darren Doud
  • Patent number: 9687266
    Abstract: The present invention provides an atherectomy catheter which has a cutting element that is able to cut both soft tissue and hard tissue, and methods of cutting material from a blood vessel lumen using a rotating cutting element. The cutting element has a sharp cutting edge that surrounds a cup-shaped surface and at least one surface of abrasive material. The cup-shaped surface directs the cut material into a tissue chamber. The cutting edge and the cup-shaped surface together are well suited to cut and remove relatively soft tissue from the blood vessel. The abrasive material surface in combination with the cutting element is well suited to abrade and remove hard material from the blood vessel.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: June 27, 2017
    Assignee: Covidien LP
    Inventors: John Robert Moberg, Alex Yang, Christopher B. Brodeur, William Joseph Whealon, Kee Lee, Phyllis Yuen, Darren Doud
  • Publication number: 20160374718
    Abstract: A catheter is provided, which includes a cutting element having one or more raised elements. The cutting element has a cup-shaped surface at the distal end that may be smooth and continuous except for the raised elements.
    Type: Application
    Filed: August 24, 2016
    Publication date: December 29, 2016
    Inventors: Kee Lee, Phyllis Yuen, Darren Doud
  • Patent number: 9445834
    Abstract: A catheter is provided, which includes a cutting element having one or more raised elements. The cutting element has a cup-shaped surface at the distal end that may be smooth and continuous except for the raised elements.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: September 20, 2016
    Assignee: Covidien LP
    Inventors: Kee Lee, Phyllis Yuen, Darren Doud
  • Publication number: 20150018858
    Abstract: A catheter is provided, which includes a cutting element having one or more raised elements. The cutting element has a cup-shaped surface at the distal end that may be smooth and continuous except for the raised elements.
    Type: Application
    Filed: May 19, 2014
    Publication date: January 15, 2015
    Applicant: Covidien LP
    Inventors: Kee Lee, Phyllis Yuen, Darren Doud
  • Patent number: 8784440
    Abstract: A catheter is provided, which includes a cutting element having one or more raised elements. The cutting element has a cup-shaped surface at the distal end that may be smooth and continuous except for the raised elements.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: July 22, 2014
    Assignee: Covidien LP
    Inventors: Kee Lee, Phyllis Yuen, Darren Doud
  • Publication number: 20100312263
    Abstract: The present invention provides an atherectomy catheter which has a cutting element that is able to cut both soft tissue and hard tissue, and methods of cutting material from a blood vessel lumen using a rotating cutting element. The cutting element has a sharp cutting edge that surrounds a cup-shaped surface and at least one surface of abrasive material. The cup-shaped surface directs the cut material into a tissue chamber. The cutting edge and the cup-shaped surface together are well suited to cut and remove relatively soft tissue from the blood vessel. The abrasive material surface in combination with the cutting element is well suited to abrade and remove hard material from the blood vessel.
    Type: Application
    Filed: April 27, 2010
    Publication date: December 9, 2010
    Applicant: FOX HOLLOW TECHNOLOGIES, INC.
    Inventors: John Robert Moberg, Alex Yang, Christopher B. Brodeur, William Joseph Whealon, Kee Lee, Phyllis Yuen, Darren Doud
  • Publication number: 20090216180
    Abstract: A catheter is provided, which includes a cutting element having one or more raised elements. The cutting element has a cup-shaped surface at the distal end that may be smooth and continuous except for the raised elements.
    Type: Application
    Filed: December 1, 2008
    Publication date: August 27, 2009
    Applicant: Fox Hollow Technologies, Inc.
    Inventors: Kee Lee, Phyllis Yuen, Darren Doud
  • Publication number: 20070159049
    Abstract: A particle rendering method and system that can receive a selection of a shape and/or a motion of a particle or a selection or a correction of a predetermined particle pattern, and generate a particle corresponding to the selection thereby generating a particle that has the desired shape and motion. Furthermore, the method and system can render a large number of particles in real time by sorting a plurality of particles using a render group. The particle rendering system includes a receiving module to receive a selection on a shape or a motion of a particle, and a first particle generation unit to generate a first particle corresponding to the shape or the motion by calling information corresponding to the shape selection from a shape information module or information corresponding to the motion selection from a motion information module.
    Type: Application
    Filed: January 11, 2007
    Publication date: July 12, 2007
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Do Kim, Kee Lee, Se Tak, Sang Woo, Jeong Ahn
  • Publication number: 20070112342
    Abstract: A method and apparatus for controlling the extent of tissue ablation are disclosed. The method utilizes delivering energy from an energy deliver device to a plurality of deployed electrodes and regulating energy delivered to the electrodes based on the temperature sensed by at least one remote elongate sensor element. A control device may be used to supply energy to the electrodes, to produce tissue ablation that advances from individual-electrode ablation regions to fill a combined-electrode ablation volume. Information from the sensor element(s) is used for determining the extent of ablation in the regions of the sensor elements. The supply of energy to the electrodes can thus be regulated to control the level and extent of tissue ablation throughout the combined-electrode volume.
    Type: Application
    Filed: January 8, 2007
    Publication date: May 17, 2007
    Inventors: Rob Pearson, Steve Daniel, Daniel Balbierz, Kee Lee, Jessica Liang, Martha Getaneh
  • Publication number: 20070094978
    Abstract: The invention relates to a wood based flooring material having an upper surface and a backing surface, the wood based flooring material comprising one or more layers, wherein the backing surface has a coating of a thermoplastic composition, wherein the thermoplastic composition has a ratio elastic modulus G? to viscous modulus G?, G?/G?, of less than or equal to about 5 at 0.001 Hz and 25° C. The invention also relates to a method of producing the flooring material.
    Type: Application
    Filed: September 13, 2006
    Publication date: May 3, 2007
    Applicant: AKZO NOBEL COATINGS INTERNATIONAL B.V.
    Inventors: Tomas Svanholm, Johan Blix, Kee Lee
  • Publication number: 20060212032
    Abstract: A tissue ablation device and method for tissue ablation are described. The tissue ablation device comprises an energy source and an introducer coupled to the energy source, the introducer having a body, a proximal end, and a distal end. The introducer carries an electrode array that comprises a plurality of electrodes, each electrode of the plurality of electrodes is configured to extend from the body of the introducer when moved from a retracted state to a deployed state. The electrode array is designed to encircle a portion of a target tissue when the electrodes are extended into the deployed state and to form a relatively spherical shaped ablation pattern in a tissue volume surrounding the target tissue when energized by the energy source.
    Type: Application
    Filed: January 18, 2006
    Publication date: September 21, 2006
    Inventors: Steven Daniel, David Morris, Kee Lee
  • Publication number: 20060151068
    Abstract: Disclosed is a method of manufacturing Fe-based soft magnetic powder for a high-frequency application. The method includes the steps of manufacturing Fe-9Al-6Si alloy powder; deforming the Fe-9Al-6Si alloy powder into a flake-like form using a high energy ball mill, and heat-treating the flake-like Fe-9Al-6Si alloy powder to relieve stress and be re-crystallized to have a super fine grain size. 0.1˜5 weight percent of lubricant with respect to the alloy powder and balls of the high energy ball mill is added during the ball mill processing. A soft magnetic core made of the Fe-based powder is also disclosed.
    Type: Application
    Filed: January 6, 2006
    Publication date: July 13, 2006
    Inventors: Kee Lee, Jin Kim
  • Publication number: 20060134855
    Abstract: A method for forming a capacitor of a semiconductor device includes forming a first insulation layer having a storage node plug on a semiconductor substrate; forming an etch stop layer and a second insulation layer sequentially on the substrate having the first insulation layer; forming a hole exposing a portion of the storage node plug by selectively etching the second insulation layer by using the etch stop layer; recessing a portion of the storage node plug exposed by the hole; forming a barrier metal layer on a surface of the recessed storage node plug; forming a storage node electrode connected to the storage node plug through the barrier metal layer in the hole; and forming a dielectric layer and a metal layer for a plate electrode sequentially on the storage node electrode.
    Type: Application
    Filed: June 15, 2005
    Publication date: June 22, 2006
    Applicant: Hynix Semiconductor, Inc.
    Inventors: Hyung Choi, Jong Park, Kee Lee, Jong Lee
  • Publication number: 20060115953
    Abstract: Disclosed is a method for forming a capacitor of a semiconductor device, which can secure wanted charging capacity and also improve leakage current characteristics. The method comprises the steps of: forming a storage electrode on a semiconductor substrate; forming a dielectric layer formed of Ti(1-x)TbxO on the storage electrode; and forming a plate electrode on the dielectric layer formed of Ti(1-x)TbxO.
    Type: Application
    Filed: May 4, 2005
    Publication date: June 1, 2006
    Inventor: Kee Lee
  • Publication number: 20060003538
    Abstract: Disclosed is a method of forming a capacitor of a semiconductor device which can secure a desired leakage current characteristic while securing a desired charging capacitance. The inventive method of forming a capacitor of a semiconductor device comprises steps of: forming a bottom electrode on a semiconductor substrate with a storage node contact so that the bottom electrode is connected with the storage node contact; plasma-nitrifying the bottom electrode to form a first nitrification film on the surface of the bottom electrode; forming a La2O3 dielectric film on the bottom electrode including the first nitrification film; plasma-nitrifying the La2O3 dielectric film to form a second nitrification film on the surface of the La2O3 dielectric film; and forming a top electrode on the La2O3 dielectric film including the second nitrification film.
    Type: Application
    Filed: November 30, 2004
    Publication date: January 5, 2006
    Inventor: Kee Lee
  • Publication number: 20050280066
    Abstract: A capacitor in a semiconductor device having a dual dielectric film structure and a fabrication method therefor are disclosed. The capacitor comprises: a lower electrode formed on a semiconductor substrate, a dielectric film of a dual dielectric film structure composed of an Si3N4 chloride-free thin film and a Ta2O5 thin film, which is formed on the lower electrode, and an upper electrode formed on the dielectric film. Meanwhile, the method for fabricating the capacitor comprises the steps of: forming a lower electrode on a semiconductor substrate, forming a dielectric film of a dual dielectric film structure composed of an Si3N4 thin film and a Ta2O5 thin film on the lower electrode, and forming an upper electrode on the dielectric film.
    Type: Application
    Filed: August 11, 2005
    Publication date: December 22, 2005
    Inventors: Kee Lee, Byung Hong
  • Patent number: 6090105
    Abstract: An ablation apparatus includes an introducer with a distal end sufficiently sharp to penetrate tissue. An energy delivery device is configured to be coupled to an energy source. The energy delivery device includes a first electrode and a second electrode each with a tissue piercing distal portion. The first and second electrodes are at least partially positionable in the introducer and deployable from the introducer at a selected tissue site to an expanded state. In the expanded state the deployed first and second electrodes distend laterally away from the introducer with a radius of curvature to form a shaped array of deployed electrodes at the tissue site when positioned at the selected tissue site. The first electrode distal portion and the second electrode distal portion are each at least partially made of a shaped memory alloy material that displays stress induced martensite behavior above body temperature. A cable couples the energy source to the energy delivery device.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: July 18, 2000
    Assignee: Rita Medical Systems, Inc.
    Inventors: John Zepeda, Chaya Hirsch, Kee Lee, Edward J. Gough