Patents by Inventor Sergei D. Teplyakov

Sergei D. Teplyakov 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).

  • Sand mold compositions containing as catalyst, methyl alcohol solutions of benzenesulphonic acid
    Patent number: 4163741
    Abstract: A sand for making cores and moulds which comprises 100 parts by weight of a refractory filler, between 1.0 and 3.0 parts by weight of a binder, and between 0.4 and 2.0 parts by weight of an acid catalyst of crystal hydrate benzene-sulphonic acid in the form of an 80- to 92-percent solution in methyl alcohol.The present invention makes it possible to prepare a sand for making cores and moulds which displays a cold setting rate and strength higher than ever before. The cold setting rate in terms of the time after mixing at which the pattern or corebox can be removed satisfactorily is not over 1 min. and the compression strength of the sand is at least 60 N/cm.sup.2 at the time of removing the pattern or corebox.
    Type: Grant
    Filed: April 15, 1977
    Date of Patent: August 7, 1979
    Inventors: Sergie S. Zhukovsky, Nikolai I. Shadrin, Sergei D. Teplyakov, Abram M. Lyass, deceased, by Inna E. Lyass, administrator