Patents by Inventor Marco Hafermann

Marco Hafermann 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).

  • Fluorescent whitening agents and mixtures thereof
    Patent number: 10787769
    Abstract: Novel fluorescent whitening agents, compositions or mixtures thereof with known fluorescent whitening agents, their preparation, and their use. The novel fluorescent whitening agents (FWAs) contain three structural subunits derived from 4,4?-diamino-2,2?-stilbenedisulfonic acid. The novel compounds and their mixtures with known FWAs show very good effectiveness as fluorescent whitening agents for cellulosic materials, in particular for paper.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: September 29, 2020
    Assignee: BLANKOPHOR GMBH & CO. KG
    Inventors: Marco Hafermann, Bernd Hauschel, Bernhard Hunke, Theo Lansing, Michael Kraemer, Robert Peekhaus
  • FLUORESCENT WHITENING AGENTS AND MIXTURES THEREOF
    Publication number: 20190194871
    Abstract: The invention relates to novel fluorescent whitening agents, compositions or mixtures thereof with known fluorescent whitening agents, their preparation, and their use. The novel fluorescent whitening agents contain three structural subunits derived from 4,4?-diamino-2,2?-stilbenedisulfonic acid. The novel compounds and their mixtures with known FWAs show very good effectiveness as fluorescent whitening agents for cellulosic materials, in particular for paper.
    Type: Application
    Filed: May 17, 2017
    Publication date: June 27, 2019
    Inventors: Marco Hafermann, Bernd Hauschel, Bernhard Hunke, Theo Lansing, Michael Kraemer, Robert Peekhaus
  • Disulfo-type fluorescent whitening agents
    Patent number: 8696867
    Abstract: Concentrated aqueous fluorescent whitening agent preparations are disclosed for optically whitening paper, wherein the preparation contains a specific disulfo-type fluorescent whitening agent.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: April 15, 2014
    Assignee: Blankophor GmbH & Co. KG
    Inventors: Bernhard Hunke, Andrei Tauber, Michael Kraemer, Guenter Klug, Theo Lansing, Marco Hafermann
  • DISULFO-TYPE FLUORESCENT WHITENING AGENTS
    Publication number: 20120211188
    Abstract: Concentrated aqueous fluorescent whitening agent preparations are disclosed for optically whitening paper, wherein the preparation contains a specific disulfo-type fluorescent whitening agent.
    Type: Application
    Filed: September 17, 2010
    Publication date: August 23, 2012
    Applicant: BLANKOPHOR GMBH & CO. KG
    Inventors: Bernhard Hunke, Andrei Tauber, Michael Kraemer, Guenter Klug, Theo Lansing, Marco Hafermann