Patents by Inventor Siebe Hoff

Siebe Hoff 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).

  • Middle distillate fuel compositions
    Patent number: 4113442
    Abstract: Middle distillate compositions are disclosed which contain a filterability improver which may be considered to be a mono- or polyester of a specified C.sub.10-40 hydrocarbyl alcohol and a hydroxy-carboxylic acid and, in some cases, a pour point depressant.
    Type: Grant
    Filed: March 21, 1977
    Date of Patent: September 12, 1978
    Assignee: Shell Oil Company
    Inventors: Siebe Hoff, Gerhardus Ockers, Arnold A. Buitelaar, Eduard J. Van De Kraats