Patents by Inventor Alfredo Wust

Alfredo Wust 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).

  • Process for the production of benzothiazole sulphene amides
    Patent number: 4801707
    Abstract: Benzothiazole sulphene amides are obtained from dibenzothiazolyl disulphide and water-soluble amines in the absence of an oxidizing agent and in the presence of aqueous alkali in a high yield and with very good stability in storage by placing the amine solution in water and simultaneously adding dibenzothiazolyl disulphide and aqueous alkali from separate storage vessels.
    Type: Grant
    Filed: December 24, 1986
    Date of Patent: January 31, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Alfredo Wust, Tony Van Osselaer
  • Process for preparing benzothiazolesulphenamides
    Patent number: 4751301
    Abstract: Benzothiazolesulphenamides can be prepared in high yield and purity from dibenzothiazolyl disulphide and a primary or secondary amine in the absence of an oxidizing agent in a water-immiscible organic solvent and in the presence of aqueous alkali by presenting a solution of the amine in the organic solvent and adding dibenzothiazolyl disulphide and aqueous alkali either simultaneously or in succession.
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: June 14, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Alfredo Wust, Tony van Osselaer
  • Process for the production of 2,2'-dibenzothiazolyl disulphide
    Patent number: 4591647
    Abstract: 2,2'-dibenzothiazolyl disulphide produced from an alkali metal salt of 2-mercaptobenzothiazole by oxidation using chlorine is obtained substantially free from acid by-products if oxidation is carried out under such conditions that the reaction mixture still contains at least 2.5%, by weight, of the alkali metal salt of 2-mercaptobenzothiazole at the end of the reaction.
    Type: Grant
    Filed: August 16, 1984
    Date of Patent: May 27, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventor: Alfredo Wust
  • Process for separating off phenol from a mixture thereof with a cresol
    Patent number: 4325789
    Abstract: A process for separating phenol from a mixture of the same with cresol which comprises including in the mixture a component which has a dipole moment of 0 to 0.5 Debye and has a boiling point, under 1 bar, in the temperature range from 120.degree. to 220.degree. C. or which has a dipole moment of 0.5 to 2.5 Debyes and has a boiling point, under 1 bar, in the temperature range from 150.degree. to 190.degree. C. and distilling off phenol together with said component to leave behind said cresol.
    Type: Grant
    Filed: January 31, 1980
    Date of Patent: April 20, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Alfredo Wust, Knut Hammerstrom