Patents by Inventor Steffen Scheithauer

Steffen Scheithauer 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).

  • Oral Dosage Forms for Propiverine or Pharmaceutically Acceptable Salts Thereof Having Prolonged Release of the Active Agent
    Publication number: 20080317848
    Abstract: By suitable retardation oral pharmaceutical compositions containing propiverine or one or several pharmaceutically acceptable salts thereof in an amount of 4 mg to 60 mg propiverine and having a prolonged release of the active agent are produced. Preferably a blend of active agent and optionally one or more acidic substances having a pKa value of less than 6.65 are provided with a retarding coating or are embedded in a matrix which is then optionally coated with further retarding layers.
    Type: Application
    Filed: April 8, 2004
    Publication date: December 25, 2008
    Applicant: APOGEPHA ARZNEIMITTEL GMBH
    Inventors: Thomas Gramatte, Peter Gruber, Michael Heschel, Dirk Pamperin, Jan Ploen, Steffen Scheithauer, Wolfgang Wehner, Peter Guldner
  • Process for the stabilization and antifogging of photographic silver halide emulsions
    Patent number: 4131470
    Abstract: A process for the stabilization of and the prevention or substantial reduction of fogging in the use of photographic silver halide emulsions, characterized in that compounds selected from the group consisting of those represented by the general formulas I, II, and III: ##STR1## are added to the emulsion, before or during chemical sensitization and before coating of the emulsions onto a support therefor, wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as herein described.
    Type: Grant
    Filed: December 21, 1976
    Date of Patent: December 26, 1978
    Assignee: VEB Filmfabrik Wolfen
    Inventors: Gunther Fischer, Beate Wenzel, Steffen Scheithauer, Udo Franz, Karl-Wilhelm Junge, Christof Schroter, Siegfried Gahler, Johannes Morgenstern
  • Process of sensitizing silver halide emulsion with a dithioester
    Patent number: 4030928
    Abstract: Method for increasing the sensitivity of a photographic silver halide-gelatin emulsion comprising at the beginning of the chemical ripening adding to the emulsion of a dithioester of the formula: ##STR1## in which R is alkyl, .alpha.-hydroxyalkyl, .alpha.-hydroxyaralkyl, condensed aryl, or o- or p-substituted phenyl or .alpha.-naphthyl, the o- or p- located substituent being a F, OH, dialkylamino, sulfo, phenyl, phenylazo or anilidocarbonyl group and R.sub.1 is alkyl or aralkyl.
    Type: Grant
    Filed: November 18, 1975
    Date of Patent: June 21, 1977
    Assignee: VEB Filmfabrik Wolfen-Fotochemisches Kombinat
    Inventors: Siegfried Gahler, Karl-Wilhelm Junge, Gunther Fischer, Steffen Scheithauer, Horst Viola