Patents by Inventor Jacques P. Denny

Jacques P. Denny 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).

  • Re-tanning process
    Patent number: 5464451
    Abstract: A process for the re-tanning of tanned leather or pelt, wherein the tanned leather pelt is re-tanned with(A) a polymeric carboxylic acid, containing .alpha.-hydroxyacrylic units as constituent units of the polymer, optionally in salt formwith the proviso that for this re-tanning (A) is not employed immediately after a mineral tanning, immediately before a mineral re-tanning or after a mineral re-tanning and also not in a direct connection with a mineral after-treatment.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: November 7, 1995
    Assignees: Sandoz Ltd., Muenzing Chemie GmbH
    Inventors: Jacques P. Denny, Josep R. Sorolla