Patents by Inventor Wilhelm Pirotte

Wilhelm Pirotte 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).

  • Litter for small animals
    Patent number: 4924808
    Abstract: For producing litter for small animals and more especially litter of cats straw is firstly ground to produce powdered straw which is then pressed to form briquettes and the latter are broken down into irregular fragments with dimensions of the order of a few millimeters and which are very well tolerated by the animals, have a high absorbency and easily disposed of.
    Type: Grant
    Filed: September 19, 1988
    Date of Patent: May 15, 1990
    Inventor: Wilhelm Pirotte