Patents by Inventor Bernard Stofer

Bernard Stofer 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).

  • Process for the continuous removal of undesirable components of solid particles by a solvent applied in counterflow
    Patent number: 4396560
    Abstract: A cyclical and automatable process and apparatus for continuously removing undesired components from solid particles by means of a solvent, the process including maintaining an expanded bed of solid particles in a vertical column, supplying a suitable solvent to the bed to flow through the bed either upwardly or downwardly in a selectably alternating manner, supplying solid particles to the top of the column while the solvent flows upwardly therethrough and interrupting the supply of solid particles and removing a bottom portion of the bed by the solvent when it flows downwardly.
    Type: Grant
    Filed: November 14, 1980
    Date of Patent: August 2, 1983
    Assignee: Gesellschaft zur Forderung der Forschung an der Eidgenossisschen Technischen Hochschule
    Inventor: Bernard Stofer
  • Process and apparatus for the continuous removal of undesirable components of solid particles by a solvent applied in counterflow
    Patent number: 4382910
    Abstract: A cyclical and automatable process and apparatus for continuously removing undesired components from solid particles by means of a solvent, the process including maintaining an expanded bed of solid particles in a vertical column, supplying a suitable solvent to the bed to flow through the bed either upwardly or downwardly in a selectably alternating manner, supplying solid particles to the top of the column while the solvent flows upwardly therethrough and interrupting the supply of solid particles and removing a bottom portion of the bed by the solvent when it flows downwardly.
    Type: Grant
    Filed: November 14, 1980
    Date of Patent: May 10, 1983
    Assignee: Gesellschaft zur Forderund der Forschung an der Eidgenossischen Technischen Hochschule
    Inventor: Bernard Stofer
  • Process for the continuous removal of undesirable components of solid particles by a solvent applied in counterflow
    Patent number: 4304742
    Abstract: A cyclical and automatable process and apparatus for continuously removing undesired components from solid particles by means of a solvent, the process including maintaining an expanded bed of solid particles in a vertical column, supplying a suitable solvent to the bed to flow through the bed either upwardly or downwardly in a selectably alternating manner, supplying solid particles to the top of the column while the solvent flows upwardly therethrough and interrupting the supply of solid particles and removing a bottom portion of the bed by the solvent when it flows downwardly.
    Type: Grant
    Filed: January 29, 1979
    Date of Patent: December 8, 1981
    Assignee: Gesellschaft zur Forderung der Forschung an der Eidgenossischen Technischen Hochschule
    Inventor: Bernard Stofer