Patents by Inventor John Vournakis

John Vournakis 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: 20080026064
    Abstract: The present invention relates to compositions comprising complexes of human cells and polymer fibers and methods of their use for therapeutic purposes. Methods of making such compositions are also provided. The present invention encompasses compositions comprising poly-?-1?4-N-acetylglucosamine polymers and stored platelets and their use for promoting wound healing and achieving hemostasis.
    Type: Application
    Filed: September 24, 2007
    Publication date: January 31, 2008
    Inventors: John Vournakis, Sergio Finkielsztein
  • Publication number: 20070105815
    Abstract: The present invention relates to a purified, easily produced poly-?-1?4-N-acetylglucosamine (p-GlcNAc) polysaccharide species. The p-GlcNAc of the invention is a polymer of high molecular weight whose constituent monosaccharide sugars are attached in a ?-1?4 conformation, and which is free of proteins, and substantially free of single amino acids, and other organic and inorganic contaminants. In addition, derivatives and reformulations of p-GlcNAc are described. The present invention further relates to methods for the purification of the p-GlcNAc of the invention from microalgae, preferably diatom, starting sources. Still further, the invention relates to methods for the derivatization and reformulation of the p-GlcNAc. Additionally, the present invention relates to the uses of pure p-GlcNAc, its derivatives, and/or its reformulations.
    Type: Application
    Filed: December 19, 2006
    Publication date: May 10, 2007
    Inventors: John Vournakis, Sergio Finkielsztein, Ernest Pariser, Mike Helton
  • Publication number: 20060229662
    Abstract: A vascular compression apparatus and method for applying pressure onto an area of a patient generally including a blood vessel and a wound site, such as a blood vessel puncture, after a cannulated procedure for the purpose of controlling bleeding and achieving hemostasis. The vascular compression apparatus includes a handle, a shaft and a pad. The shaft extends generally downward from the center of the bottom side of the handle. The pad is connected generally off-center of its top side to the bottom end of the shaft. The bottom side of the pad is convex to allow the vascular compression device to be rocked back and forth. In use, the pad is generally placed proximal to the catheter insertion site and over the blood vessel containing the catheter. The device is rocked proximally to control blood flow while removing the catheter. After the catheter is removed from the puncture site, the device is rocked distally to the puncture site, where pressure is applied until hemostasis is achieved.
    Type: Application
    Filed: March 29, 2005
    Publication date: October 12, 2006
    Applicant: Marine Polymer Technologies, Inc.
    Inventors: Sergio Finkielsztein, Marco Finkielsztein, John Vournakis
  • Publication number: 20060229664
    Abstract: A vascular compression apparatus and method for applying pressure onto an area of a patient generally including a blood vessel and a wound site, such as a blood vessel puncture, after a cannulated procedure for the purpose of controlling bleeding and achieving hemostasis. The vascular compression apparatus includes a handle, a shaft and a pad. The shaft extends generally downward from the center of the bottom side of the handle. The pad is connected generally off-center of its top side to the bottom end of the shaft. The bottom side of the pad is convex to allow the vascular compression device to be rocked back and forth. In use, the pad is generally placed proximal to the catheter insertion site and over the blood vessel containing the catheter. The device is rocked proximally to control blood flow while removing the catheter. After the catheter is removed from the puncture site, the device is rocked distally to the puncture site, where pressure is applied until hemostasis is achieved.
    Type: Application
    Filed: March 29, 2006
    Publication date: October 12, 2006
    Applicant: MARINE POLYMER TECHNOLOGIES
    Inventors: Sergio Finkielsztein, Marco Finkielsztein, John Vournakis
  • Publication number: 20050075597
    Abstract: The present invention relates generally to the field of hemodialysis, including methods and kits that can be employed to improve hemodialysis therapy. The present invention encompasses methods and kits useful for reducing vascular access complications associated with hemodialysis therapy and prolonging the period of time for which a vascular access site can be used in a patient.
    Type: Application
    Filed: September 13, 2004
    Publication date: April 7, 2005
    Inventors: John Vournakis, Sergio Finkielsztein, Ernst Pariser
  • Publication number: 20050004072
    Abstract: The present invention relates to a purified, easily produced poly-?-1?4-N-acetylglucosamine (p-GlcNAc) polysaccharide species. The p-GlcNAc of the invention is a polymer of high molecular weight whose constituent monosaccharide sugars are attached in a ?-1?4 conformation, and which is free of proteins, and substantially free of single amino acids, and other organic and inorganic contaminants. In addition, derivatives and reformulations of p-GlcNAc are described. The present invention further relates to methods for the purification of the p-GlcNAc of the invention from microalgae, preferably diatom, starting sources. Still further, the invention relates to methods for the derivatization and reformulation of the p-GlcNAc. Additionally, the present invention relates to the uses of pure p-GlcNAc, its derivatives, and/or its reformulations.
    Type: Application
    Filed: June 1, 2004
    Publication date: January 6, 2005
    Inventors: John Vournakis, Sergio Finkielsztein, Ernest Pariser, Mike Helton
  • Patent number: 5219749
    Abstract: Chitin deacetylase, the enzyme that catalyzes the hydrolysis of acetamide groups of N-acetylglucosamine in chitin, was purified to homogeneity from mycelial extracts of the fungus Mucor rouxii. In addition, immunoglobulin specifically reactive with chitin deacetylase has been produced and purified.
    Type: Grant
    Filed: October 9, 1991
    Date of Patent: June 15, 1993
    Assignee: Institute for Molecular Biology & Biotechnology/FORTH
    Inventors: Vassilis Bouriotis, Dimitri Kafetzopoulos, John Vournakis