Patents by Inventor Klaus J. Friedrich

Klaus J. Friedrich 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).

  • Method Of Making An Alkoxylated Polyethylenimine Product
    Publication number: 20100216949
    Abstract: A method of making an alkoxylated polyethyleneimine (APEI) product having reduced discoloration includes treating a composition including a component selected from the group of polyethyleneimine (PEI), alkoxylated polyethyleneimine (APEI) intermediate, and combinations thereof that is used to make the APEI product. The method of treating the composition includes adding water to the composition in an amount of from 2 to 20 parts by weight, based on the total weight of the composition. The water is stripped from the composition within a relatively low temperature range of from 158 to 203° F. until less than or equal to 0.2 parts by weight of water, based on the total weight of the composition, is present in the composition. The aqueous solutions of APEI product thus made have Gardner color values of less than 6.
    Type: Application
    Filed: February 7, 2006
    Publication date: August 26, 2010
    Applicant: BASF AKTIENGESELLSCHAFT
    Inventors: Klaus J. Friedrich, Sridhar G. Iyer, Jay Gregory Otten
  • Method of making an alkoxylated polyethylenimine product
    Patent number: 7736525
    Abstract: A method of making an alkoxylated polyethyleneimine (APEI) product having reduced discoloration includes treating a composition including a component selected from the group of polyethyleneimine (PEI), APEI intermediate, and combinations thereof that is used to make the APEI product. The method of treating the composition includes heating a composition that includes an adduct of a conjugate base and PEI, water, and the component at a temperature of from 158 to 338° F. for a period of at least three hours in the absence of additional water in order to substantially decompose the adduct in the composition. The aqueous solutions of APEI product thus made have Gardner color values of less than 6.
    Type: Grant
    Filed: February 7, 2006
    Date of Patent: June 15, 2010
    Assignee: BASF Corporation
    Inventors: Chacko Thankachan, Klaus J. Friedrich, Daniel E. Coker
  • METHOD OF MAKING AN ALKOXYLATED POLYETHYLENIMINE PRODUCT
    Publication number: 20090069501
    Abstract: A method of making an alkoxylated polyethyleneimine (APEI) product having reduced discoloration includes treating a composition including a component selected from the group of polyethyleneimine (PEI), APEI intermediate, and combinations thereof that is used to make the APEI product. The method of treating the composition includes heating a composition that includes an adduct of a conjugate base and PEI, water, and the component at a temperature of from 158 to 338° F. for a period of at least three hours in the absence of additional water in order to substantially decompose the adduct in the composition. The aqueous solutions of APEI product thus made have Gardner color values of less than 6.
    Type: Application
    Filed: February 7, 2006
    Publication date: March 12, 2009
    Applicant: BASF AKTIENGESELLSCHAFT
    Inventors: Chacko Thankachan, Klaus J. Friedrich, Daniel E. Coker