Patents by Inventor Alexander Krivokapic

Alexander Krivokapic 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).

  • Methods of assessing oil field saturation through use of reactive partitioning tracers
    Patent number: 10351759
    Abstract: A family of organic tracers is proposed for single well chemical tracer tests, for example for the measurement of residual oil in petroleum reservoirs. The tracers consist of at least one ester of (hydroxyalkyl) benzoic acid of formula (I), wherein at least one of R1 to R5 is a hydroxy alkyl group —R7—OH and each of the remaining R1 to R5 groups is independently selected from H, F, Cl, Br, I, CF3CF2Cl, CFCl2, CCl3 and at least one of these remaining R1 to R5 groups is not H, R6 is selected from CH3, C2H5, C3H7, C4H9, CF3, CH2CF3, CCl3, CH2CCl3, CH2CHCl2, CH2CH2Cl, CH2CF3, CH2CHF2, CH2CH2F, CH2CH2CH2F, CH2CH2CHF2, CH2CH2CF3, CH2CH2CH2Cl, CH2CH2CH—Cl2, CH2CH2CCl3, C3H6F, C3H5F2, C3H4F3, C3H6Cl, C3H5Cl2, C3H5Cl3 or a halogenated (hydroxymethyl)phenol and R7 is selected from CH2, C2H4, C3H6, C4H8.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: July 16, 2019
    Assignee: RESTRACK AS
    Inventors: Stephen J. Sayfritz, Alexander Krivokapic
  • TRACERS
    Publication number: 20170198200
    Abstract: A family of organic tracers is proposed for single well chemical tracer tests, for example for the measurement of residual oil in petroleum reservoirs. The tracers consist of at least one ester of (hydroxyalkyl) benzoic acid of formula (I), wherein at least one of R1 to R5 is a hydroxy alkyl group —R7—OH and each of the remaining R1 to R5 groups is independently selected from H, F, Cl, Br, I, CF3CF2Cl, CFCl2, CCl3 and at least one of these remaining R1 to R5 groups is not H, R6 is selected from CH3, C2H5, C3H7, C4H9, CF3, CH2CF3, CCl3, CH2CCl3, CH2CHCl2, CH2CH2Cl, CH2CF3, CH2CHF2, CH2CH2F, CH2CH2CH2F, CH2CH2CHF2, CH2CH2CF3, CH2CH2CH2Cl, CH2CH2CH—Cl2, CH2CH2CCl3, C3H6F, C3H5F2, C3H4F3, C3H6Cl, C3H5Cl2, C3H5Cl3 or a halogenated (hydroxymethyl)phenol and R7 is selected from CH2, C2H4, C3H6, C4H8.
    Type: Application
    Filed: June 1, 2015
    Publication date: July 13, 2017
    Inventors: Stephen J. Sayfritz, Alexander Krivokapic
  • Metal-Organic Framework Catalysts and Their Use in Hydrocarbon Transformation
    Publication number: 20080306315
    Abstract: The invention relates to a porous heterogeneous catalyst material comprising frameworks of inorganic cornerstones connected by organic bridges, characterized in that as organic bridges are used ligands having a complexed catalytically active metal. The metals are preferably palladium and platinum. The ligands preferably contain nitrogen donor groups for complexing the catalytically active metal and carboxylate groups connecting to the inorganic cornerstones.
    Type: Application
    Filed: July 14, 2006
    Publication date: December 11, 2008
    Applicant: UNIVERSITETET I OSLO
    Inventors: Karl-Petter Lillerud, Mats Tilset, Unni Olsbye, Kai Chung Szeto, Morten Bjorgen, Kjell Ove Kongshaug, Silvia Bordiga, Jasmina Hafizovic, Alexander Krivokapic, Soren Jakobsen