Patents by Inventor Hartmut Durbye

Hartmut Durbye 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).

  • Animal litter and process for the production thereof
    Patent number: 4509457
    Abstract: The invention relates to animal litter or bedding made from or in conjunction with a porous material, as well as to a process for the production thereof, the pH value of porous materials being adjusted to between approximately 5.0 to approximately 9.0 in the end product by treatment with liquid or gaseous acid substances in order to obtain an optimum smell reducing action.
    Type: Grant
    Filed: May 28, 1982
    Date of Patent: April 9, 1985
    Assignee: Mars Inc.
    Inventor: Hartmut Durbye