Patents by Inventor Adrien P. N. Tignol

Adrien P. N. Tignol 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 purification of mercaptobenzothiazole
    Patent number: 4371698
    Abstract: Process for the purification of mercaptobenzothiazole in which the crude product resulting from the reaction of aniline, sulfur and carbon disulfide according to the known process is treated with aniline.
    Type: Grant
    Filed: February 14, 1980
    Date of Patent: February 1, 1983
    Assignee: P C U K Produits Chimiques Ugine Kuhlmann
    Inventors: Michel J. C. Alicot, Adrien P. N. Tignol
  • Process for the preparation of dibenzothiazyl disulfide
    Patent number: 4337344
    Abstract: A process for the preparation of dibenzothiazyl disulfide by oxidation of mercaptobenzothiazole in aqueous suspension by means of hydrogen peroxide, in which the oxidation is effected in the presence of ethylenediaminetetraacetic acid or an alkali metal salt derived therefrom.
    Type: Grant
    Filed: July 31, 1979
    Date of Patent: June 29, 1982
    Assignee: PCUK Produits Chimiques Ugine Kuhlmann
    Inventors: Michel J. C. Alicot, Adrien P. N. Tignol
  • Process for the purification of mercaptobenzothiazole
    Patent number: 4192804
    Abstract: Process for the purification of mercaptobenzothiazole prepared according to known processes, characterized in that the crude product is treated with carbon tetrachloride or with 1,1,2,2-tetrachloroethylene.
    Type: Grant
    Filed: July 6, 1978
    Date of Patent: March 11, 1980
    Assignee: Produits Chimiques Ugine Kuhlmann Service Propriete Industrielle
    Inventors: Michel J. C. Alicot, Rene H. P. Rhode, Adrien P. N. Tignol
  • Process for the sequestration of oxygen dissolved in water and compositions useful for such purpose
    Patent number: 4124500
    Abstract: A process is disclosed for eliminating oxygen dissolved in water wherein there is added to the water a hydrazine solution containing, as the activator, an amount of a compound of the formula: ##STR1## WHEREIN A = 0, 1 OR 2; B = 0, 1, 2 OR 3; C = 0, 1, 2 OR 3; B + C = 2 OR 3; AND A + B + C = 3, 4 OR 5, SUFFICIENT TO INCREASE THE RATE OR REMOVAL OF SUCH OXYGEN COMPARED TO THE RATE WHEN AN AQUEOUS HYDRAZINE SOLUTION, PER SE, IS USED.The use of aqueous solutions of hydrazine to eliminate oxygen dissolved in water, such as boiler or heater water, is known.
    Type: Grant
    Filed: June 20, 1977
    Date of Patent: November 7, 1978
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventors: Basile Arghiropoulos, Adrien P. N. Tignol