Patents by Inventor Tak-lung Chang

Tak-lung 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).

  • Publication number: 20210008247
    Abstract: Various embodiments disclosed relate to curable calcium phosphate compositions for use with porous structures and methods of using the same. In various embodiments, the present invention provides a curable calcium phosphate composition or a cured product thereof, with the curable calcium phosphate composition including calcium phosphate and a perfusion modifier. In various embodiments, the present invention provides an apparatus comprising a porous structure at least partially in contact with the curable calcium phosphate composition or a cured product thereof. The porous structure can include a porous substrate including a plurality of ligaments that define pores of the porous substrate, and a biocompatible metal coating on the plurality of ligaments of the porous substrate.
    Type: Application
    Filed: September 25, 2020
    Publication date: January 14, 2021
    Inventors: Siddhesh Angle, Michael Strunk, Tak Lung Chang, Bradford J. Coale, Greg Stebbins, Imants Liepins
  • Patent number: 10888636
    Abstract: Various embodiments disclosed relate to curable calcium phosphate compositions for use with porous structures and methods of using the same. In various embodiments, the present invention provides a curable calcium phosphate composition or a cured product thereof, with the curable calcium phosphate composition including calcium phosphate and a perfusion modifier. In various embodiments, the present invention provides an apparatus comprising a porous structure at least partially in contact with the curable calcium phosphate composition or a cured product thereof. The porous structure can include a porous substrate including a plurality of ligaments that define pores of the porous substrate, and a biocompatible metal coating on the plurality of ligaments of the porous substrate.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: January 12, 2021
    Assignee: ZIMMER KNEE CREATIONS, INC.
    Inventors: Siddhesh Angle, Michael Strunk, Tak Lung Chang, Bradford J. Coale, Greg Stebbins, Imants Liepins
  • Publication number: 20180311402
    Abstract: Featured are a biocompatible, injectable, self-setting, cohesive, bone-bonding and remodeling calcium phosphate composite material and its use in methods of repairing defective bone, e.g., in vertebroplasty augmentation and kyphoplasty.
    Type: Application
    Filed: April 25, 2018
    Publication date: November 1, 2018
    Inventors: Aliassghar N. TOFIGHI, Aron D. ROSENBERG, Tak Lung CHANG, Michael STRUNK
  • Patent number: 9956313
    Abstract: Featured are a biocompatible, injectable, self-setting, cohesive, bone-bonding and remodeling calcium phosphate composite material and its use in methods of repairing defective bone, e.g., in vertebroplasty augmentation and kyphoplasty.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: May 1, 2018
    Assignee: Life Science Enterprises, Inc.
    Inventors: Aliassghar N. Tofighi, Aron D. Rosenberg, Tak Lung Chang, Michael Strunk
  • Publication number: 20170100507
    Abstract: Various embodiments disclosed relate to curable calcium phosphate compositions for use with porous structures and methods of using the same. In various embodiments, the present invention provides a curable calcium phosphate composition or a cured product thereof, with the curable calcium phosphate composition including calcium phosphate and a perfusion modifier. In various embodiments, the present invention provides an apparatus comprising a porous structure at least partially in contact with the curable calcium phosphate composition or a cured product thereof. The porous structure can include a porous substrate including a plurality of ligaments that define pores of the porous substrate, and a biocompatible metal coating on the plurality of ligaments of the porous substrate.
    Type: Application
    Filed: October 7, 2016
    Publication date: April 13, 2017
    Inventors: Siddhesh Angle, Michael Strunk, Tak Lung Chang, Bradford J. Coale, Greg Stebbins, Imants Liepins
  • Publication number: 20160228598
    Abstract: Featured are a biocompatible, injectable, self-setting, cohesive, bone-bonding and remodeling calcium phosphate composite material and its use in methods of repairing defective bone, e.g., in vertebroplasty augmentation and kyphoplasty.
    Type: Application
    Filed: April 18, 2016
    Publication date: August 11, 2016
    Inventors: Aliassghar N. TOFIGHI, Aron D. ROSENBERG, Tak Lung CHANG, Michael STRUNK
  • Patent number: 9314545
    Abstract: Featured are a biocompatible, injectable, self-setting, cohesive, bone-bonding and remodeling calcium phosphate composite material and its use in methods of repairing defective bone, e.g., in vertebroplasty augmentation and kyphoplasty.
    Type: Grant
    Filed: April 15, 2009
    Date of Patent: April 19, 2016
    Assignee: LIFE SCIENCE ENTERPRISES, INC.
    Inventors: Aliassghar N. Tofighi, Aron D. Rosenberg, Tak Lung Chang, Michael Strunk
  • Publication number: 20110224675
    Abstract: Featured are a biocompatible, injectable, self-setting, cohesive, bone-bonding and remodeling calcium phosphate composite material and its use in methods of repairing defective bone, e.g., in vertebroplasty augmentation and kyphoplasty.
    Type: Application
    Filed: April 15, 2009
    Publication date: September 15, 2011
    Inventors: Aliassghar N. Tofighi, Aron D. Rosenberg, Tak Lung Chang, Michael Strunk
  • Patent number: 5952422
    Abstract: Method for forming a polyurethane based adhesive composition in which a reaction mixture of at least one NCO-terminated prepolymer and a polyhydroxy compound is heated at a temperature and for a length of time sufficient to provide a gel content of from about 30 to 42% by weight and a molecular weight of extractables of at least about 45,000. Polyurethane based adhesives prepared by the method and medical devices employing the same are also disclosed.
    Type: Grant
    Filed: December 18, 1996
    Date of Patent: September 14, 1999
    Assignee: Bristol-Myers Squibb Company
    Inventors: Tak-lung Chang, Sheng-hung Kuo, Kishore Shah, Agis Kydonieus
  • Patent number: 5714543
    Abstract: In accordance with the present invention novel polyurethane PSAs containing water soluble polymer additives have enhanced water uptake. The water soluble polymer additives suitable for use herein have a solubility parameter in poorly hydrogen-binding solvents (e.g., hexane, cyclohexane and the like) in the range of from 8-10. The water soluble polymers must also be free from moieties which will react with isocyanates. Such PSAs retain their transparency and peel strength characteristics and can still be employed as relatively thin films (i.e., 2 to 100 mils) while exhibiting only minimal swelling when in contact with moist environments.
    Type: Grant
    Filed: January 13, 1994
    Date of Patent: February 3, 1998
    Assignee: Bristol-Myers Squibb Company
    Inventors: Kishore R. Shah, Tak-Lung Chang, Agis Kydonieus
  • Patent number: 5591820
    Abstract: Pressure-sensitive adhesives which possess absorptivity and/or permeability properties to remove transepidermal water loss and/or other bodily fluids that come into contact with the adhesive, in combination with a fine balance of cohesion and adhesion properties, can be formulated by controlling the crosslinking of a polyurethane polymer having excess hydroxyl functionality, a glass transition temperature of less than about 0.degree. C., a moisture absorption of at least about 20% of its weight and/or a moisture vapor transmission rate of at least about 300 grams/meter.sup.2 /24 hours measured at 37.degree. C. and a 90% relative humidity gradient. Adhesives of these polymers possess a peel adhesion to human skin of between about 0.3 and 4 newtons/cm width of the polymer or adhesive.
    Type: Grant
    Filed: May 9, 1995
    Date of Patent: January 7, 1997
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Agis Kydonieus, Ladislav Bastar, Kishore Shah, Khosrow Jamshidi, Tak-lung Chang, Sheng-hung Kuo
  • Patent number: 5527271
    Abstract: A composite material for wound dressings having a fibrous wound-contacting substrate, such as cotton gauze, impregnated with a thermoplastic hydrogel forming polymer and methods of making the same.
    Type: Grant
    Filed: March 30, 1994
    Date of Patent: June 18, 1996
    Assignee: Bristol-Myers Squibb Co.
    Inventors: Kishore R. Shah, Agis Kydonieus, Khosrow Jamshidi, Stefanie C. Decker, Tak-lung Chang