Patents by Inventor Holger Focke

Holger Focke 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 preparation of dodecamethylenebismelamine and the use thereof
    Patent number: 4730084
    Abstract: The invention relates to a process for preparing dodecamethylenebismelamine (DMB) by reacting 2,4-diamino-6-chloro-1,3,5-triazine with 1,12-diaminododecane in an alkaline aqueous suspension, to which the diamine has been added in a water-miscible solvent. The product is used to stabilize aqueous formaldehye solutions.
    Type: Grant
    Filed: May 19, 1987
    Date of Patent: March 8, 1988
    Assignee: Degussa Aktiengesellschaft
    Inventors: Peter Werle, Holger Focke, Alwin Boes
  • Process for the preparation of dodecamethylenebismelamine
    Patent number: 4683307
    Abstract: The invention relates to a process for preparing dodecamethylenebismelamine (DMB) by reacting 2,4-diamino-6-chloro-1,3,5-triazine with 1,12-diaminododecane in an alkaline aqueous suspension, to which the diamine has been added in a water-miscible solvent. The product is used to stabilize aqueous formaldehyde solutions.
    Type: Grant
    Filed: February 27, 1986
    Date of Patent: July 28, 1987
    Assignee: Degussa Aktiengesellschaft
    Inventors: Peter Werle, Holger Focke, Alwin Boes
  • Bismelamine stabilizers
    Patent number: 4492643
    Abstract: There is described new alkylene bismelamines and their production. They correspond to the formula ##STR1## in which o is a number from 10 to 18. Alkylene bismelamines serve as stabilizers for formaldehyde solutions and as such have an outstanding suitability and activity.
    Type: Grant
    Filed: November 1, 1982
    Date of Patent: January 8, 1985
    Assignee: Degussa Aktiengesellschaft
    Inventors: Peter Werle, Holger Focke, Klaus Popp, Wolfgang Merk