Patents by Inventor Gregor Groppenbacher

Gregor Groppenbacher 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).

  • Tablets coated with aqueous resin dispersions
    Patent number: 4060598
    Abstract: Coated tablets are prepared by applying to a core of active material, at least one layer of a coating composition made up of a film forming aqueous synthetic resin dispersion and from 2-50% by weight of a water or alkaline soluble material and thereafter permitting the coating composition layer to dry. The resulting coated tablet has a core surrounded by a continuous porous matrix of synthetic resin formed from the aqueous dispersion which is insoluble in water and insoluble in the gastrointestinal tract. The pores of the continuous resin matrix are filled with a discontinuous particulate material which is water or alkaline soluble. The coated tablet initially is air and moisture tight.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: November 29, 1977
    Assignee: Boehringer Mannheim G.m.b.H.
    Inventors: Gregor Groppenbacher, Peter Rieckmann, Werner Rothe
  • Process for coating tablets with aqueous resin dispersions
    Patent number: 3935326
    Abstract: Coated tablets are prepared by applying to a core of active material, at least one layer of a coating composition made up of a film forming aqueous synthetic resin dispersion and from 2-50% by weight of a water or alkaline soluble material and thereafter permitting the coating composition layer to dry. The resulting coated tablet has a core surrounded by a continuous porous matrix of synthetic resin formed from the aqueous dispersion which is insoluble in water and insoluble in the gastrointestinal tract. The pores of the continuous resin matrix are filled with a discontinuous particulate material which is water or alkaline soluble. The coated tablet initially is air and moisture tight.
    Type: Grant
    Filed: April 22, 1974
    Date of Patent: January 27, 1976
    Assignee: Boehringer Mannheim G.m.b.H.
    Inventors: Gregor Groppenbacher, Peter Rieckmann, Werner Rothe