Patents by Inventor Abraham De Kraker

Abraham De Kraker 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 production of essentially chloride-free calcium sulfonate
    Publication number: 20050004392
    Abstract: The invention relates to a process for the preparation of a low-base number calcium sulfonate that is essentially chloride free. The process involves preparing a sulfonic acid solution by adding a solvent to a sulfonic acid, optionally removing dissolved or entrained SO2 or SO3, mixing the solution with a specific amount of water and calcium hydroxide, heating the mixture, separating out excess calcium hydroxide from the mixture, removing the solvent and recovering the calcium sulfonate product in oil.
    Type: Application
    Filed: April 15, 2004
    Publication date: January 6, 2005
    Inventors: Abraham De Kraker, Steven Holmes, Krishna Kaushik