Patents by Inventor Juergen Carle

Juergen Carle 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 for producing a leather semi-finished product
    Patent number: 7753964
    Abstract: A semifinished leather product is produced from an animal hide by pretanning with the use of a chromium-free tanning agent and of a clay mineral which, after stirring for 30 minutes in water at 50° C. at a circumferential rotor speed of from 5 to 25 m/s, has a number average particle diameter of less than 2 ?m or a bimodal particle size distribution with a first, finely divided fraction whose number average particle diameter is less than 0.5 ?m and a second, coarser fraction whose number average particle diameter is less than 5 ?m, determined in each case by the method according to ISO 13320-1, by combined laser light diffraction and light scattering, a proportion of the first, finely divided fraction being from 10 to 90% by weight, and drying of the pretanned animal hide to a water content of from 5 to 45%, based on the total weight of the semifinished leather product.
    Type: Grant
    Filed: November 25, 2003
    Date of Patent: July 13, 2010
    Assignee: BASF Aktiengesellschaft
    Inventors: Stephan Hueffer, Stefan Schroeder, Juergen Carle, Thorsten Raedler, Volker Bach, Tilman Luedecke Taeger