Patents by Inventor Antons Lebedevs

Antons Lebedevs 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).

  • Publication number: 20160250185
    Abstract: The invention relates to medicine, in particular S-Phenotropil ((S)-2-(2-oxo-4-phenylpyrrolidin-1-yl)acetamide) containing pharmaceutical compositions and their use in control of body mass gain.
    Type: Application
    Filed: October 20, 2014
    Publication date: September 1, 2016
    Applicant: Latvian Institute of Organic Synthesis
    Inventors: Ivars KALVINS, Liga ZVEJNIECE, Larisa VARACEVA, Aleksandrs CERNOBROVIJS, Antons LEBEDEVS, Maija DAMBROVA, Baiba SVALBE, Edgars LIEPINS
  • Patent number: 8889902
    Abstract: Novel betaine salts of acetylsalicylic acid, namely 4-trimethylammoniobutanoate acetylsalicylic acid addition salt (gamma-butyrobetaine acetylsalicylate), L-carnitine acetylsalicylic acid addition salt and 3-(trimethylammonioamino)propanoate (meldonium) acetylsalicylic acid addition salt. Use of meldonium acetylsalicylate as antiplatelet agent for treating various pathologies induced by platelet aggregation, anti-inflammatory and antihyperlipidemic agent.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: November 18, 2014
    Assignee: Tetra, SIA
    Inventors: Ivars Kalvins, Anatolijs Birmans, Maris Veveris, Antons Lebedevs, Anatolijs Misnovs
  • Publication number: 20140296317
    Abstract: The invention relates to the 5S,4R-enantiomer of 2-(5-methyl-2-oxo-4-phenyl-pyrrolidin-1-yl)-acetamide with cognition enhancing activity of high pharmacological value and to its preparation method which includes the synthesis of 5S-methyl-4R-phenylpyrrolidin-2-one, its N-alkylation with ethyl haloacetate and the treatment of intermediate ethyl 2-(5S-methyl-2-oxo-4R-phenyl-pyrrolidin-1-yl)-acetate with ammonia.
    Type: Application
    Filed: June 16, 2014
    Publication date: October 2, 2014
    Inventors: Ivars KALVINS, Antons LEBEDEVS, Aleksandrs CERNOBROVIJS, Maija DAMBROVA, Liga ZVEJNIECE, Maksims VORONA, Grigorijs VEINBERGS
  • Patent number: 8846944
    Abstract: The present invention provides a method for regeneration of chiral 2,2?-cyclopropylidene-bis(oxazolines), such as (3&R,3?aR,8aS,8?aS)-2,2?-cyclopropylidenebis-[3a,8a]-dihydro-8H-indeno-[1,2-d]-oxazole and (45,4?5,5R,5?R)-2,2?-cyclopropylidenebis-4,5-diphenyldihydro-4,5-oxazole, used as a part of complex catalysts for e.g. stereoselective addition reactions, from the reaction mixtures, by selective sorption of 2,2?-cyclopropylidene-bis(oxazolines) on a sorbent, such as silica gel, isolation of the sorbent from reaction mixture, desorption of 2,2?-cyclopropylidene-bis(oxazolines) from the sorbent with suitable organic solvent and final recovery of 2,2?-cyclopropylidene-bis(oxazolines) from the organic solvent used for desorption process. Catalytic quality of recovered compounds does not differ from those in freshly prepared catalysts.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: September 30, 2014
    Assignee: Latvian Institute of Organic Synthesis
    Inventors: Ivars Kalvinsh, Antons Lebedevs, Aleksandrs Chernobrovijs, Grigory Veinberg, Maksims Vorona, Agnija Ievina
  • Patent number: 8791273
    Abstract: The invention relates to the 5S,4R-enantiomer of 2-(5-methyl-2-oxo-4-phenyl-pyrrolidin-1-yl)-acetamide with cognition enhancing activity of high pharmacological value and to its preparation method which includes the synthesis of 5S-methyl-4R-phenylpyrrolidin-2-one, its N-alkylation with ethyl haloacetate and the treatment of intermediate ethyl 2-(5S-methyl-2-oxo-4R-phenyl-pyrrolidin-1-yl)-acetate with ammonia.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: July 29, 2014
    Assignee: JSC Grindeks
    Inventors: Ivars Kalvins, Antons Lebedevs, Aleksandrs Cernobrovijs, Maija Dambrova, Liga Zvejniece, Maksims Vorona, Grigorijs Veinbergs
  • Publication number: 20120215010
    Abstract: The invention relates to the 5S,4R-enantiomer of 2-(5-methyl-2-oxo-4-phenyl-pyrrolidin-1-yl)-acetamide with cognition enhancing activity of high pharmacological value and to its preparation method which includes the synthesis of 5S-methyl-4R-phenylpyrrolidin-2-one, its N-alkylation with ethyl haloacetate and the treatment of intermediate ethyl 2-(5S-methyl-2-oxo-4R-phenyl-pyrrolidin-1-yl)-acetate with ammonia.
    Type: Application
    Filed: November 4, 2010
    Publication date: August 23, 2012
    Applicant: JSC Grindeks
    Inventors: Ivars Kalvins, Antons Lebedevs, Aleksandrs Cernobrovijs, Maija Dambrova, Liga Zvejniece, Maksims Vorona, Grigorijs Veinbergs
  • Publication number: 20120088742
    Abstract: Novel betaine salts of acetylsalicylic acid, namely 4-trimethylammoniobutanoate acetylsalicylic acid addition salt (gamma-butyrobetaine acetylsalicylate), L-carnitine acetylsalicylic acid addition salt and 3-(trimethylammonioamino)propanoate (meldonium) acetylsalicylic acid addition salt. Use of meldonium acetylsalicylate as antiplatelet agent for treating various pathologies induced by platelet aggregation, anti-inflammatory and antihyperlipidemic agent.
    Type: Application
    Filed: June 21, 2010
    Publication date: April 12, 2012
    Applicant: Tetra, Sia
    Inventors: Ivars Kalvins, Anatolijs Birmans, Maris Veveris, Antons Lebedevs, Anatolijs Misnovs
  • Publication number: 20110263864
    Abstract: The present invention provides a method for regeneration of chiral 2,2?-cyclopropylidene-bis(oxazolines), such as (3&R, 3?aR,8aS,8?aS)-2,2?-cyclopropylidenebis-[3a,8a]-dihydro-8H-indeno-[1,2-d]-oxazole and (45,4?5,5R,5?R)-2,2?-cyclopropy-lidenebis-4,5-diphenyldihydro-4,5-oxazole, used as a part of complex catalysts for e.g. stereoselective addition reactions, from the reaction mixtures, by selective sorption of 2,2?-cyclopropylidene-bis(oxazolines) on a sorbent, such as silica gel, isolation of the sorbent from reaction mixture, desorption of 2,2?-cyclopropylidene-bis(oxazolines) from the sorbent with suitable organic solvent and final recovery of 2,2?-cyclopropylidene-bis(oxazolines) from the organic solvent used for desorption process. Catalytic quality of recovered compounds does not differ from those in freshly prepared catalysts.
    Type: Application
    Filed: November 30, 2009
    Publication date: October 27, 2011
    Inventors: Ivars Kalvinsh, Antons Lebedevs, Aleksandrs Chernobrovijs, Grigory Veinberg, Maksims Vorona, Agnija Levina