Patents by Inventor Ernst-Moritz von-Arndt

Ernst-Moritz von-Arndt 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).

  • Prevention of or reduction in the formation of amines and N-nitrosamines during the manufacture and use of elastomers
    Patent number: 5679838
    Abstract: Monofunctional or multifunctional isocyanates having the general formulaR--(N.dbd.C.dbd.O).sub.xwhere R is any organic remainder, x.gtoreq.1,or compounds which form such isocyanates under the influence of temperature are used in elastomeric compounds to be vulcanized as inhibitors for amines.
    Type: Grant
    Filed: February 12, 1996
    Date of Patent: October 21, 1997
    Assignee: Firma Carl Freudenberg
    Inventors: Ernst-Moritz von Arndt, Gunter Stein
  • Prevention of or reduction in the formation of amines and N-nitrosamines during the manufacture and use of elastomers
    Patent number: 5658990
    Abstract: Monofunctional or multifunctional isothiocyanates having the general formulaR--(N.dbd.C.dbd.S).sub.xwhere R is any organic remainder; x.gtoreq.1, or compounds which form such isothiocyanates under the influence of temperature are used in elastomeric compounds to be vulcanized as inhibitors for amines.
    Type: Grant
    Filed: February 12, 1996
    Date of Patent: August 19, 1997
    Assignee: Firma Carl Freudenberg
    Inventors: Ernst-Moritz von Arndt, Gunter Stein
  • Process of making a seal with grooved surface
    Patent number: 5630980
    Abstract: A rod or piston seal with a seal body made of a polymeric material, which contacts the surface that is being sealed and is capable of relative displacement with a sealing surface. The sealing surface is interrupted in the movement direction by at least two grooves, extending in the peripheral direction, that have a spacing between them. The spacing consists of at least one land that extends in the axial direction between the mutually adjacent grooves, such that the ratio A between the width of the land and the width of the grooves in the movement direction is 1:2 to 200:1, the ratio B between the width and depth of the grooves is 10:1 to 1:5, and the depth of the grooves has a value of 1 to 200 .mu.m.
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: May 20, 1997
    Assignee: Firma Carl Freudenberg
    Inventors: Ernst-Moritz von Arndt, G unter Stein
  • Rod or piston seal with grooved surface
    Patent number: 5507505
    Abstract: A rod or piston seal with a seal body made of a polymeric material, which contacts the surface that is being sealed and is capable of relative displacement with a sealing surface. The sealing surface is interrupted in the movement direction by at least two grooves, extending in the peripheral direction, that have a spacing between them. The spacing consists of at least one land that extends in the axial direction between the mutually adjacent grooves, such that the ratio A between the width of the land and the width of the grooves in the movement direction is 1:2 to 200:1, the ratio B between the width and depth of the grooves is 10:1 to 1:5, and the depth of the grooves has a value of 1 to 200 .mu.m.
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: April 16, 1996
    Assignee: Firma Carl Freudenberg
    Inventors: Ernst-Moritz von-Arndt, Gunter Stein