Patents by Inventor Berthold Buchholz

Berthold Buchholz 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).

  • Resorbable Polyetheresters and Medicinal Implants Made Therefrom
    Publication number: 20070014848
    Abstract: The invention relates to the use of absorbable block copolymers with polyether and polyester units for preparing surgical implants which are suitable for the human or animal body, and the block copolymers in question. The block copolymers used according to the invention and those which are new according to the invention are characterised by high mechanical strength and rapid absorption kinetics.
    Type: Application
    Filed: July 13, 2006
    Publication date: January 18, 2007
    Applicant: Boehringer Ingelheim Pharma GmbH & Co. KG
    Inventors: Berthold Buchholz, Anja Enderle
  • Process for preparing reabsorbable polyesters by mass polymerization
    Patent number: 6706854
    Abstract: The invention relates to a process for preparing reabsorbable polyesters by bulk polymerisation, wherein the reaction components are melted and homogenised in a stirred reactor, the reaction mixture is then transferred into a number of smaller-volume containers, the reaction mixture is polymerised in these containers and the polyester obtained is isolated by removing it from the containers, and the use of the reabsorbable polyesters thus produced for preparing reabsorbable implants.
    Type: Grant
    Filed: January 9, 2003
    Date of Patent: March 16, 2004
    Assignee: Boehringer Ingelheim Pharma GmbH & Co. KG
    Inventors: Berthold Buchholz, Matthias Schellhorn, Andreas Weber
  • Process for preparing reabsorbable polyesters by mass polymerisation
    Publication number: 20030162894
    Abstract: The invention relates to a process for preparing reabsorbable polyesters by bulk polymerisation, wherein the reaction components are melted and homogenised in a stirred reactor, the reaction mixture is then transferred into a number of smaller-volume containers, the reaction mixture is polymerised in these containers and the polyester obtained is isolated by removing it from the containers, and the use of the reabsorbable polyesters thus produced for preparing reabsorbable implants.
    Type: Application
    Filed: January 9, 2003
    Publication date: August 28, 2003
    Applicant: Boehringer Ingelheim Pharma GmbH & Co. KG
    Inventors: Berthold Buchholz, Matthias Schellhorn, Andreas Weber
  • Semisolid mixtures of amorphous oligomers and crystalline polymers based on lactic acid
    Patent number: 5725881
    Abstract: The present invention relates to semisolid mixtures of oligomers and/or polymers based on lactic acid, the preparation thereof and the use thereof as absorbable implants.
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: March 10, 1998
    Assignee: Boehringer Ingelheim KG
    Inventors: Berthold Buchholz, Gunther Entenmann
  • Resorbable mouldings and process for producing them
    Patent number: 5700901
    Abstract: The invention relates to resorbable mouldings and processes for producing them.
    Type: Grant
    Filed: January 11, 1995
    Date of Patent: December 23, 1997
    Assignee: Boehringer Ingelheim KG
    Inventors: Achim Hurst, Wladis Winkler-Gwienek, Berthold Buchholz, Dieter Bendix, Gunther Entenmann
  • Copolymers of trimethylenecarbonate and optionally inactive lactides
    Patent number: 5610266
    Abstract: The present invention relates to new copolymers of trimethylenecarbonate and optically inactive lactides, the preparation and use thereof.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: March 11, 1997
    Assignee: Boehringer Ingelheim KG
    Inventor: Berthold Buchholz
  • Continuous process for the preparation of resorable polyesters and the use thereof
    Patent number: 5378801
    Abstract: The invention relates to a continuous process for the preparation of resorbable polyesters.
    Type: Grant
    Filed: August 3, 1993
    Date of Patent: January 3, 1995
    Inventors: Dieter Reichert, Franz D. Klingler, Horst Schwall, Albert Christmann, Berthold Buchholz
  • Process for preparing polyesters based on hydroxycarboxylic acids
    Patent number: 5302694
    Abstract: The present invention relates to a method of producing polyesters based on hydroxycarboxylic acids, more particularly based on .alpha.-hydroxycarboxylic acids.
    Type: Grant
    Filed: August 24, 1993
    Date of Patent: April 12, 1994
    Assignee: Boehringer Ingelheim GmbH
    Inventor: Berthold Buchholz
  • Process for the preparation of trimethylene carbonate
    Patent number: 5212321
    Abstract: A process for producing trimethylene carbonate wherein 1,3-propanediol is reacted with diethylcarbonate in the presence of zinc powder, zinc oxide, tin powder, tin halide or an organo-tin compound, at an elevated temperature.
    Type: Grant
    Filed: June 17, 1992
    Date of Patent: May 18, 1993
    Assignee: Boehringer Ingelheim GmbH
    Inventors: Klaus R. Muller, Berthold Buchholz, Joachim Hess