Patents by Inventor Liguang Tang

Liguang Tang 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).

  • Fluorescent dyed lubricant for medical devices
    Patent number: 7052512
    Abstract: A composition and method for detecting the presence, location and uniformity of a lubricious coating on a medical device. The method includes the steps of preparing a mixture of a biocompatible hydrophilic fluorescent dye and a hydrophobic lubricant, applying the mixture to the surface of a medical device to form a coating capable of exhibiting fluorescence, and subjecting the surface of the medical device to a source of energy capable of inducing a fluorescent emission. The coating composition may further comprise a surfactant. This method finds particular utility for catheters, especially stent delivery catheters.
    Type: Grant
    Filed: July 18, 2001
    Date of Patent: May 30, 2006
    Assignee: Boston Scientific SciMed, Inc.
    Inventors: Dachuan Yang, Liguang Tang, Dixie Lang
  • Hydrophilic lubricity coating for medical devices comprising a hybrid top coat
    Patent number: 6610035
    Abstract: The present invention relates to a medical device for insertion into the body wherein the device has at least one surface which periodically comes into contact with a second surface. The first surface comprises an improved lubricious coating having a first hydrogel layer and a second hydrophobic top coating which prevents the hydrogel coating from prematurely absorbing too much moisture. The hydrophobic top coating comprises at least one hydrophilic surfactant which acts as a carrier to facilitate removal of the hydrophobic top coating upon entry into an aqueous environment.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: August 26, 2003
    Assignee: SciMed Life Systems, Inc.
    Inventors: Dachuan Yang, Lixiao Wang, Joel Stanslaski, Liguang Tang
  • Hydrophilic lubricity coating for medical devices comprising a hydrophobic top coat
    Patent number: 6589215
    Abstract: The present invention relates to a medical device for insertion into the body wherein the device has at least one surface which periodically comes into contact with a second surface. The first surface comprises an improved lubricious coating having a first hydrogel layer and a second hydrophobic top coating which prevents the hydrogel coating from prematurely absorbing too much moisture. The hydrophobic top coating comprises at least one hydrophilic surfactant which acts as a carrier to facilitate removal of the hydrophobic top coating upon entry into an aqueous environment.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: July 8, 2003
    Assignee: SciMed Life Systems, Inc.
    Inventors: Dachuan Yang, Lixiao Wang, Joel Stanslaski, Liguang Tang
  • Fluorescent dyed lubricant for medical devices
    Publication number: 20030018353
    Abstract: A composition and method for detecting the presence, location and uniformity of a lubricious coating on a medical device. The method includes the steps of preparing a mixture of a biocompatible hydrophilic fluorescent dye and a hydrophobic lubricant, applying the mixture to the surface of a medical device to form a coating capable of exhibiting fluorescence, and subjecting the surface of the medical device to a source of energy capable of inducing a fluorescent emission. The coating composition may further comprise a surfactant. This method finds particular utility for catheters, especially stent delivery catheters.
    Type: Application
    Filed: July 18, 2001
    Publication date: January 23, 2003
    Inventors: Dachuan Yang, Liguang Tang, Dixie Lang
  • Fluorescent dyed adhesive for bonding various components in a medical device
    Patent number: 6461326
    Abstract: An intraluminal medical device comprised of two or more substrates formed of the same or a different material wherein the substrates are bonded together using a fluorescent dyed adhesive.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: October 8, 2002
    Assignee: SciMed Life Systems, Inc.
    Inventors: Dahuan Yang, Joel Stanslaski, Liguang Tang, Joseph Guaire Mary Scanlon
  • Hydrophilic lubricity coating for medical devices comprising a hybrid top coat
    Publication number: 20010027299
    Abstract: The present invention relates to a medical device for insertion into the body wherein the device has at least one surface which periodically comes into contact with a second surface. The first surface comprises an improved lubricious coating having a first hydrogel layer and a second hydrophobic top coating which prevents the hydrogel coating from prematurely absorbing too much moisture. The hydrophobic top coating comprises at least one hydrophilic surfactant which acts as a carrier to facilitate removal of the hydrophobic top coating upon entry into an aqueous environment.
    Type: Application
    Filed: March 30, 2001
    Publication date: October 4, 2001
    Inventors: Dachuan Yang, Lixiao Wang, Joel Stanslaski, Liguang Tang
  • Hydrophilic lubricity coating for medical devices comprising a hydrophobic top coat
    Publication number: 20010003796
    Abstract: The present invention relates to a medical device for insertion into the body wherein the device has at least one surface which periodically comes into contact with a second surface. The first surface comprises an improved lubricious coating having a first hydrogel layer and a second hydrophobic top coating which prevents the hydrogel coating from prematurely absorbing too much moisture. The hydrophobic top coating comprises at least one hydrophilic surfactant which acts as a carrier to facilitate removal of the hydrophobic top coating upon entry into an aqueous environment.
    Type: Application
    Filed: December 1, 2000
    Publication date: June 14, 2001
    Inventors: Dachuan Yang, Lixiao Wang, Joel Stanslaski, Liguang Tang
  • Hydrophilic lubricity coating for medical devices comprising a hydrophobic top coat
    Patent number: 6176849
    Abstract: The present invention relates to a medical device for insertion into the body wherein the device has at least one surface which periodically comes into contact with a second surface. The first surface comprises an improved lubricious coating having a first hydrogel layer and a second hydrophobic top coating which prevents the hydrogel coating from prematurely absorbing too much moisture. The hydrophobic top coating comprises at least one hydrophilic surfactant which acts as a carrier to facilitate removal of the hydrophobic top coating upon entry into an aqueous environment.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: January 23, 2001
    Assignee: Scimed Life Systems, Inc.
    Inventors: Dachuan Yang, Lixiao Wang, Joel Stanslaski, Liguang Tang