Patents by Inventor Gunnar Hasselgren

Gunnar Hasselgren 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: 11110199
    Abstract: Hydrogel-based scaffolds useful for promoting pulp cell growth and biosynthesis, regulating pulp cell migration and morphology, or both as well as methods for their production and use are provided.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: September 7, 2021
    Assignee: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK
    Inventors: Helen H. Lu, Sagaw Prateepchinda, Gunnar Hasselgren
  • Publication number: 20190209734
    Abstract: Hydrogel-based scaffolds useful for promoting pulp cell growth and biosynthesis, regulating pulp cell migration and morphology, or both as well as methods for their production and use are provided.
    Type: Application
    Filed: March 14, 2019
    Publication date: July 11, 2019
    Inventors: Helen H. LU, Sagaw PRATEEPCHINDA, Gunnar HASSELGREN, Dror SELIKTAR
  • Publication number: 20120308963
    Abstract: Devices, methods, and systems for the design, fabrication, modification, and implantation of dental prostheses. An implant is created that has a shape closely or precisely conforming to the natural shape of a modified or unmodified tooth socket. The implant is used to anchor any of a variety of dental restorations or other substitute devices to bone. Further, methods, systems, and apparatuses for taking radiographs at specific, standard, and/or reproducible angles. A first radiograph is taken, using an aiming apparatus, with the aiming direction forming a first angle with the normal to an image plane of an image receptor. At least one additional radiograph is taken, using the aiming apparatus, at a different aiming direction from the first direction. Radiographs taken with the multiple aiming angles are used to create a three-dimensional image of an object represented by the radiographs.
    Type: Application
    Filed: September 30, 2010
    Publication date: December 6, 2012
    Applicant: The Trustees of Columbia University in the City of New York
    Inventors: Gunnar Hasselgren, Anas Selman, Chia-Yi Chen
  • Publication number: 20090148486
    Abstract: The present disclosed subject matter relates to methods and compositions for restoring a diseased or damaged tooth such that infection is inhibited or eliminated and pulp regeneration is facilitated. The disclosed subject matter also includes a composition comprising a physiologically acceptable matrix seeded with pulp cells. The matrix can be capable of being injected into the pulp chamber of a tooth. In some embodiments, the matrix of a composition includes a hydrogel (e.g., collagen, chitosan, alginate, MATRIGEL™, gelatin, JELL-O®, fibrin), a mesh (e.g., polylactide-coglycolide (PLGA) mesh, polylactide (PLA) mesh, or polyglycolide (PGA) mesh, a cross-linked fiber mesh, a nanofiber mesh, a mesh fabric, biodegradable polymer mesh), a microsphere (biodegradable polymer microsphere, a hydrogel microsphere), or a combination of any of the foregoing. In yet other embodiments, the matrix includes a nanofiber, an artificial three-dimensional scaffold material, or a synthetic three-dimensional scaffold material.
    Type: Application
    Filed: October 29, 2007
    Publication date: June 11, 2009
    Inventors: Helen Lu, Gunnar Hasselgren, Mona McAlarney