Patents by Inventor Paul C. Begovac

Paul C. Begovac 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: 11752099
    Abstract: The present disclosure is directed to injectable formulations that include biodegradable polymers based on trimethylene carbonate (TMC) with mole fractions of polylactic acid (PLA) and/or polyglycolic acid (PGA) that are used to deliver a bioactive agent to a targeted site. Excipients such as polyethylene glycol (PEG) may be added to the formulations to reduce the injection force and/or to modulate the release of the bioactive agent. Suitable biodegradable polymers for use in the injectable formulations include D,L-PLA:TMC, D-PLA:TMC, L-PLA:TMC, TMC:PLA:PGA and variations thereof. Additionally, copolymers of TMC and PLA and terpolymers of TMC:PLA:PGA may be formed into nanoparticles and delivered to the target site with an injectable crosslinkable polyethylene glycol system. In at least one embodiment, the injectable formulations are used to treat ocular diseases.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: September 12, 2023
    Inventors: Paul C. Begovac, Robert L. Cleek, Mei Li
  • Publication number: 20180271779
    Abstract: The present disclosure is directed to injectable formulations that include biodegradable polymers based on trimethylene carbonate (TMC) with mole fractions of polylactic acid (PLA) and/or polyglycolic acid (PGA) that are used to deliver a bioactive agent to a targeted site. Excipients such as polyethylene glycol (PEG) may be added to the formulations to reduce the injection force and/or to modulate the release of the bioactive agent. Suitable biodegradable polymers for use in the injectable formulations include D,L-PLA:TMC, D-PLA:TMC, L-PLA:TMC, TMC:PLA:PGA and variations thereof. Additionally, copolymers of TMC and PLA and terpolymers of TMC:PLA:PGA may be formed into nanoparticles and delivered to the target site with an injectable crosslinkable polyethylene glycol system. In at least one embodiment, the injectable formulations are used to treat ocular diseases.
    Type: Application
    Filed: March 26, 2018
    Publication date: September 27, 2018
    Inventors: Paul C. Begovac, Robert L. Cleek, Mei Li
  • Patent number: 9005269
    Abstract: Bioabsorbable self-expanding medical devices formed of an integral framework with a multiplicity of fenestrations are provided. The framework is continuous, non-filamentous, non-braided, and non-interlaced. The devices includes a non-blended hydrolysable co-polymeric material comprising an amorphous component with a glass transition temperature that is below ambient body temperature and a crystallizable component that possesses a crystalline melting point in excess of ambient body temperature. The devices radially expand from a compressed first diameter to an uncompressed second diameter equal to or greater than 1.5 times the first diameter within two minutes in an aqueous medium at 37° C. following release of a compressive force placed on the devices. Additionally, the medical device does not change axial length significantly as the radial dimensions of the devices are changed.
    Type: Grant
    Filed: July 28, 2008
    Date of Patent: April 14, 2015
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Joseph R. Armstrong, Paul C. Begovac, Robert L. Cleek, Edward H. Cully, Charles Flynn, Byron K. Hayes, Ryan V. Peterson, Michael J. Vonesh, Charles F. White
  • Publication number: 20080281393
    Abstract: The present invention is directed to bioabsorbable self-expanding medical devices for use inside or outside body conduits that self-expand at, or below, normal human body temperature without requisite for a polymeric thermal transition.
    Type: Application
    Filed: July 28, 2008
    Publication date: November 13, 2008
    Inventors: Joseph R. Armstrong, Paul C. Begovac, Robert L. Cleek, Edward H. Cully, Charles Flynn, Byron K. Hayes, Ryan V. Peterson, Michael J. Vonesh, Charles F. White
  • Patent number: 4321914
    Abstract: A percutaneous device to provide a path from the exterior of the epidermal tissue to interior body spaces and structures with a skirt of material with PTFE having an open microstructure for the ingrowth of epidermal and connective tissue.
    Type: Grant
    Filed: April 22, 1980
    Date of Patent: March 30, 1982
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Paul C. Begovac, William C. Bruchman