Patents by Inventor Torben Schaefer

Torben Schaefer 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: 5807583
    Abstract: A process for the manufacture of sustained release pellets comprising pelletizing a mixture containing the drug in finely divided form and a binder. The characteristic feature is that:(a) said binder is in particle form consisting of one or more water-insoluble wax-like binder substance(s) with a melting point above 40.degree. C., and(b) said pelletization step is performed by mechanically working said mixture, in a high shear mixer, under the input of a sufficient amount of energy for the binder to melt and pelletization to take place.
    Type: Grant
    Filed: January 12, 1995
    Date of Patent: September 15, 1998
    Assignee: Pharmacia AB
    Inventors: Henning Kristensen, Torben Schaefer, Lars Juul Thomsen, deceased, Arne Kristensen
  • Patent number: 5030400
    Abstract: By agglomeration in a high speed mixer spherical granules having a desired granule size distribution are obtained by supplying the agglomeration liquid by means of an atomizer wheel axially positioned in the high speed mixer and by controlling the quantity and evaporation of said liquid in consideration of the changes occurring with respect to water binding ability of the agglomerates during compaction. An apparatus for carrying out the method includes a mixer bowl with an impeller on a central shaft through the bottom of the bowl and an atomizer with an atomizer wheel with its shaft in alignment with the shaft of the impeller.
    Type: Grant
    Filed: June 28, 1990
    Date of Patent: July 9, 1991
    Assignee: A/S Niro Atomizer
    Inventors: Svend Danielsen, Per Holm, Gjelstrup H. Kristensen, Torben Schaefer