Patents by Inventor Sandor Balint

Sandor Balint 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 preparing N-phenyl-N-methoxyacetyl-DL-alanine methyl ester derivatives
    Patent number: 5639905
    Abstract: Process for the preparation of N-phenyl-N-methoxyacetyl-DL-alanine methyl ester derivatives of the formula (I). ##STR1## wherein R is a C.sub.1-4 alkyl residue; and n is a cardinal number between from 1 to 3,which comprises reacting an N-methoxyacetyl derivative of the formula (II). ##STR2## wherein R and n are as defined above, with a stoichiometric amount of an alkaline metal alkoxide, at a temperature between 80.degree. C. and 150.degree. C., until completion of the removal of the alkanol present in the system, then reacting the thus obtained alkaline metal salt of the compound of formula (II) directly or after isolation with a methyl DL-x-halopropionate.
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: June 17, 1997
    Assignee: Nitrokemia Ipartelepek
    Inventors: Lajos Nagy, Jeno Pelyva, Pal Agocs, Csaba Soptei, Judit Benczik nee Pasztor, Zoltan Kolonics, Sandor Balint, Dezso Sebok, Jolan Cseke, Tibor Kranitz, Laszlo Legradi
  • Process for preparing N-phosphonomethyl-glycine
    Patent number: 4983764
    Abstract: The invention relates to an improvement of a process for preparing N-phosphonomethyl-glycine by oxydation of N-phosphonomethyl-imino-diacetic acid in an aqueous sulphuric acidic medium with hydrogen peroxide.A characteristic feature is using a waste acid liquor as reaction medium formed as aqueous sulphuric acid and obtained after the separation of N-phosphonomethyl-glycine when carrying out oxydation. This solution is optionally diluted with water until a concentration of 12-18 weight % of sulphuric acid and 3-5 weight % of N-phosphonomethyl-glycine.
    Type: Grant
    Filed: October 24, 1989
    Date of Patent: January 8, 1991
    Assignee: Nitrokemia Ipartelepek
    Inventors: Jeno Pelyva, Laszlo Lendvai, Sandor Balint, Zoltan Kolonics, Csaba Soptei, Sandor Laszlo, Bela Karacsonyi, Janosne Benczik, Csaba Kayos, Sandor Silye
  • Process for preparing N-phosphono-methyl-imino-diacetic acid
    Patent number: 4931585
    Abstract: The invention relates to the preparation of N-phosphono-methyl-imino-diacetic acid from the calcium salt of imino-diacetic acid in a simplified synthesis. The process comprises in that the imino-diacetic acid calcium salt is heated with concentrated hydrochloric acid in a molar ratio of 2-3:1 at a temperature between 50.degree.-100.degree. C., the obtained imino-diacetic acid hydrogen-chloride is separated then dissolved in water and is reacted with phosphorous acid in a molar ratio of 1.0-1.2:1 calculated for imino-diacetic acid hydrogen chloride and with the aqueous solution of formaldehyde in a molar ratio of 1.0-1.4:1 under stirring, and the obtained product is isolated.
    Type: Grant
    Filed: February 2, 1989
    Date of Patent: June 5, 1990
    Assignee: Nitrokemia Ipartelepek
    Inventors: Jeno Pelyva, Csaba Soptei, Zoltan Kolonics, Bela Karacsonyi, Sandor Balint, Janosne Benczik, Csaba Kayos, Laszlo Lendvai, Sandor Laszlo
  • 2-chloro-ethyl phosphonic acid esters and plant growth regulating agents containing same as active ingredient
    Patent number: 4776874
    Abstract: The present invention relates to new compounds of the general formula (I) ##STR1## wherein R stands for hydrogen, C.sub.1-8 straight or branched chained alkyl, C.sub.1-4 haloalkyl, C.sub.1-4 alkoxy-C.sub.1-2 alkyl,R.sup.1 stands for 2,3-dihydro-2,2-dimethyl-benzofuran-7-yl, 4-methyl-coumarin-7-yl, 2,2,4-trimethyl-(2H)-chromen-5-yl or 2,2,4-trimethyl-(2H)-chromen-7-yl and Me stands for a monovalent cation and represents the salt of the acid.The new compounds show plant growth regulating activity and can be used as active ingredient of plant growth regulators.
    Type: Grant
    Filed: March 13, 1986
    Date of Patent: October 11, 1988
    Assignee: Nitrokemia Ipartelepek
    Inventors: Sandor Balint, Judit Benczik nee Pasztor, Jozsef Fodor, Andras Horvath, Elemer Tomordi, Csaba Soptei, Jozsef Karsai, Endre Sebestyen, Sandor Gaal, Ivan Gardi, Gyorgy Kiss, Andras Papp, Imre Csatlos
  • Method and device for low energy consumption or granular products or the like containing moisture fixed or deposited at the surface with a constant yield
    Patent number: 4555858
    Abstract: A hot drying agent discharged from the section for material transport of the bound moisture, having a low moisture content, is recirculated to the front part of the drying area; the moisture content of both of the fed and discharged material is measured and by means of the differential-analogue signal thus obtained the stream of the material to be dried and in a given case the heating of the drying agent is controlled. An apparatus for performing the drying operation is also provided.
    Type: Grant
    Filed: June 14, 1983
    Date of Patent: December 3, 1985
    Assignee: "Oktober 6" Mezogazdasagi Termeloszovetkezet
    Inventors: Bela Hegedus, Sandor Balint, Janos Hudak, Gyorgy Barta, Jozsef Aszlanyi