Patents by Inventor Ralph Diener

Ralph Diener 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).

  • Preparation of salts of pharmaceutical active substances which have acidic groups
    Patent number: 5969181
    Abstract: A process for preparing salts of pharmaceutical active substances which have acidic groups by reacting the carboxylic acids with a base in the melt, wherein the acids are reacted with at least the stoichiometric amount of a base in an extruder.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: October 19, 1999
    Inventors: Jorg Breitenbach, Joerg Rosenberg, Jorg Neumann, Jurgen Zeidler, Dirk Simon, Ralph Diener
  • Preparation of semicrystalline syndiotactic polymers of vinylaromatic monomers
    Patent number: 5942589
    Abstract: Essentially syndiotactic and semicrystalline polymers which comprise vinylaromatic monomers arc prepared from a reaction mixture containing, as components, vinylaromatic compounds, metallocene complexes as catalysts and one or more cocatalysts selected from the group consisting of the strong, neutral Lewis acids, the ionic compounds having Lewis acid cations and the ionic compounds having Bronsted acids as cations, by a process in which the components are premixed before entering the reactor.
    Type: Grant
    Filed: August 1, 1997
    Date of Patent: August 24, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Josef Wunsch, Michael Schiessl, Ralph Diener
  • Continuous polymerization of vinyl monomers
    Patent number: 5576386
    Abstract: A process for the continuous polymerization of vinyl monomers to form vinyl polymers having a molecular weight M.sub.n of from 1000 to 20,000 comprisesa. carrying out the polymerization within an annular gap from 0.5 to 10 mm in width,b. confining the annular gap on the inner surface with a rotor, andc. carrying out the polymerization at from 110.degree. to 270.degree. C.
    Type: Grant
    Filed: January 28, 1993
    Date of Patent: November 19, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Manfred Niessner, Ralph Diener, Heino Thiele, Wolfram Weiss, Hans Renz