Patents by Inventor Johannes T. P. Derksen

Johannes T. P. Derksen 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 a tertiary perester
    Patent number: 6268523
    Abstract: The invention relates to a process for the preparation of a tertiary perester by contacting an acyl compound with a tertiary hydroperoxide in the presence of an enzyme catalyst. The acyl compound has the formula R1[C(O)OR2]n, wherein R1 is a linear or branched, saturated or unsaturated C1-C22 group, optionally containing one or more hetero atoms, R2 represents hydrogen or has the same meaning as described for R1, and n is 1-5, or a polyalcohol ester of R1C(O)OH, wherein R1 has the same meaning as described above. The tertiary hydroperoxide has the formula [HOOCR3R3]mR4, wherein R3 represents either a methyl or an ethyl group, R4 has the same meaning as described for R1, and m is 1-5.
    Type: Grant
    Filed: January 24, 2000
    Date of Patent: July 31, 2001
    Assignee: Akzo Nobel NV
    Inventors: Gerardus F. H. Kramer, Folkert P. Cuperus, Johannes T. P. Derksen, John Meijer, Marinus C. Tammer