Patents by Inventor John Lennart Soderberg

John Lennart Soderberg 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).

  • Patent number: 4115536
    Abstract: The present invention relates to an agent for intravascular administration for diagnostic and/or physiologic investigations, which agent consists of or contains a suspension of minute radioactive particles in a physiologically acceptable liquid.Radioactively labelled microspheres, in suspension in a physiologically acceptable liquid, have lately been increasingly used in circulation studies, studies of the shunting phenomena, microcirculation studies, nutrition studies and as a means for carrying out scintography on man and animals.
    Type: Grant
    Filed: September 10, 1975
    Date of Patent: September 19, 1978
    Assignee: Pharmacia Fine Chemicals AB
    Inventors: Ulf Sven Erik Rothman, Sven Lennart Kagedal, John Lennart Soderberg
  • Patent number: 4094832
    Abstract: A dextran derivative gel for use in electrophoretic separation processes is disclosed, which gel comprises a polymerizate obtained by the free-radical homopolymerization of a dextran derivative containing vinylic groups of the formula ##STR1## wherein A is --CH.sub.2 -- or --O-- and R is a hydrogen atom, a methyl group, a trifluoromethyl group, a fluorine, chlorine or bromine atom or a cyano group, or free-radical copolymerization of such a vinylic derivative of dextran with a low-molecular weight monovinyl compound.
    Type: Grant
    Filed: November 29, 1976
    Date of Patent: June 13, 1978
    Assignee: Pharmacia Fine Chemicals AB
    Inventor: John Lennart Soderberg
  • Patent number: 4094833
    Abstract: A dextran derivative gel in particle form for use in the separation of substances according to their molecular size and/or electrical charge by means of gel-chromatographic and/or ion exchange techniques is disclosed which gel comprises a copolymerizate obtained by the free-radical copolymerization of a dextran derivative containing vinyl and/or substituted vinyl groups with (a) a divinyl compound of the formula ##STR1## wherein R' and R" are equal or different and each represent hydrogen or methyl and X is ##STR2## --SO.sub.2 -- or the group ##STR3## wherein n is an integer from 1 to 6, inclusive, and optionally (b) a low-molecular weight monovinyl compound.
    Type: Grant
    Filed: November 29, 1976
    Date of Patent: June 13, 1978
    Assignee: Pharmacia Fine Chemicals AB
    Inventors: Haldor Ingemar Johansson, Dag Torsten Lindstrom, John Lennart Soderberg