Patents by Inventor Thomas Spengler

Thomas Spengler 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).

  • Marking liquid
    Patent number: 7604694
    Abstract: A marking liquid which contains a polymer dispersion with particles which are colored with marking agent, optionally further dyes and marking agents, one or more salts of a polyvalent, in particular bi- or trivalent cation, water and optionally moisture retaining agents and further usual additives, wherein the polymer forming the polymer particles is selected from the group of polyesters, polyester amides, polymers and copolymers based on acrylate or methacrylate with a proportion of free carboxylic acid groups of less than 10% by weight, melamine-formaldehyde-sulfonamide resins and mixtures thereof.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: October 20, 2009
    Assignee: Schwan-STABILO Schwanhausser GmbH & Co. KG
    Inventors: Hanns Dieter Denninger, Thomas Spengler, Ivan Horvat, Klaus Dieter Schröder
  • Marking liquid
    Patent number: 7365107
    Abstract: The invention relates to a marking liquid which contains a polymer dispersion with particles which are colored with marking agent, optionally further dyes and marking agents, one or more salts of a polyvalent, in particular bi- or trivalent cation, water and optionally moisture retaining agents and further usual additives, wherein the polymer forming the polymer particles is selected from the group of polyesters, polyester amides, polymers and copolymers based on acrylate or methacrylate with a proportion of free carboxylic acid groups of less than 10% by weight, melamine-formaldehyde-sulfonamide resins and mixtures thereof.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: April 29, 2008
    Assignee: Schwan-STABILO Schwanhausser GmbH & Co. KG
    Inventors: Hans-Dieter Denninger, Thomas Spengler, Ivan Horvat, Klaus-Dieter Schröder
  • MARKING LIQUID
    Publication number: 20080097006
    Abstract: A marking liquid which contains a polymer dispersion with particles which are colored with marking agent, optionally further dyes and marking agents, one or more salts of a polyvalent, in particular bi- or trivalent cation, water and optionally moisture retaining agents and further usual additives, wherein the polymer forming the polymer particles is selected from the group of polyesters, polyester amides, polymers and copolymers based on acrylate or methacrylate with a proportion of free carboxylic acid groups of less than 10% by weight, melamine-formaldehyde-sulfonamide resins and mixtures thereof.
    Type: Application
    Filed: December 20, 2007
    Publication date: April 24, 2008
    Applicant: SCHWAN-STABILO SCHWANHAUSSER GMBH & CO. KG
    Inventors: Hanns Denninger, Thomas Spengler, Ivan Horvat, Klaus-Dieter Schroder
  • Marking liquid
    Publication number: 20040110869
    Abstract: The invention relates to a marking liquid which contains a polymer dispersion with particles which are colored with marking agent, optionally further dyes and marking agents, one or more salts of a polyvalent, in particular bi- or trivalent cation, water and optionally moisture retaining agents and further usual additives, wherein the polymer forming the polymer particles is selected from the group of polyesters, polyester amides, polymers and copolymers based on acrylate or methacrylate with a proportion of free carboxylic acid groups of less than 10% by weight, melamine-formaldehyde-sulfonamide resins and mixtures thereof.
    Type: Application
    Filed: October 13, 2003
    Publication date: June 10, 2004
    Inventors: Hanns-Dieter Denninger, Thomas Spengler, Ivan Horvat, Klaus-Dieter Schroder