Patents by Inventor Hubertus Queins

Hubertus Queins 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).

  • Aldehyde condensate tackifiers for rubber
    Patent number: 4396756
    Abstract: Condensation products of aniline, a phenol or alkylated phenol and an aldehyde, especially formaldehyde, may be used as tackifiers and aging retardants for rubber, especially natural rubber.
    Type: Grant
    Filed: November 17, 1978
    Date of Patent: August 2, 1983
    Assignee: BASF Aktiengesellschaft
    Inventors: Richard Baur, Knut Oppenlaender, Gerhard Paulus, Hubertus Queins, Hubert Schoeppl
  • Rubber mixtures having improved surface tack
    Patent number: 4041222
    Abstract: 2-Oxotetrahydropyrimidines of the general formula: ##STR1## in which R.sup.1 to R.sup.4 denote hydrogen or alkyl of from 1 to 20 carbon atoms and may be the same or different. The compounds are suitable for use as tackifiers for rubber. They produce excellent and long-lasting surface tack in rubber mixtures.
    Type: Grant
    Filed: October 14, 1975
    Date of Patent: August 9, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Hubert Schoeppl, Harro Petersen, Gerhard Paulus, Hubertus Queins