Patents Assigned to Aminkemi AB
  • Method of heparinizing a charged surface of a medical article intended for blood contact
    Patent number: 4265927
    Abstract: A charged surface of a medical article intended for blood contact can be heparinized by being contacted with a collodial aqueous solution of a complex compound of heparin and a cationic surfactant, the particles of the collodial solution having attached to their surfaces charges of a polarity opposite to that of the charges of the article.
    Type: Grant
    Filed: July 10, 1978
    Date of Patent: May 5, 1981
    Assignee: Aminkemi AB
    Inventors: Jan C. Ericksson, Rolf L. Larsson
  • Method for generating a pH-function for use in electrophoresis
    Patent number: 4130470
    Abstract: Method for changing the pH value of a compound used in electrophoresis which comprises the generating of the pH-function along at least part of the separation path from the protolysis equilibrium with the separation method and/or chargeable groups immobilized in a matrix, in which the groups contain one or more of the elements carbon, sulphur, phosphorus, boron, or nitrogen.
    Type: Grant
    Filed: December 7, 1976
    Date of Patent: December 19, 1978
    Assignee: Aminkemi AB
    Inventors: Ake Rosengren, Bengt Bjellqvist, Vesna Gasparic
  • Method for inhibiting rust formation on iron-containing articles
    Patent number: 3971628
    Abstract: The corrosion of an article of iron or steel can be reduced or prevented if the surface of the article is washed with a solution of lithium hydroxide in an organic solvent which is also a solvent for water and lithium chloride. This treatment removes chlorides and other corrosion accelerators from the surface of the article.
    Type: Grant
    Filed: November 21, 1974
    Date of Patent: July 27, 1976
    Assignee: Aminkemi AB
    Inventor: Ake Roland Albin Bresle
  • Method for the preparation of aliphatic and alicyclic sulphonic acids by catalytic sulphoxidation of hydro-carbons
    Patent number: 3956371
    Abstract: A process for the preparation of saturated, nonbranched aliphatic or alicyclic sulphonic acids by reacting the corresponding hydrocarbons with sulphur dioxide and elementary oxygen is disclosed, in which process the reaction is carried out in the presence of copper as a catalyst. Reaction rates, considerably higher than those previously reported in literature, are obtained and the formation of by-products resulting in discolouration of the sulphonic acid is counteracted.
    Type: Grant
    Filed: September 13, 1972
    Date of Patent: May 11, 1976
    Assignee: Aminkemi AB
    Inventors: Bengt G. Bjellqvist, Torbjorn E. G. Westermark, Anders R. Axelsson, Martin J. Nilsson