Patents by Inventor Ulf Sven Erik Rothman

Ulf Sven Erik Rothman 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: 4069306
    Abstract: An X-ray contrast preparation comprising a) a finely divided water-insoluble inorganic X-ray contrast producing substance and b) minute particles of a hydrophilic polymer containing amino groups, which polymer is insoluble in water at body temperature and which consists of a water-insoluble, but water-swellable three-dimensional network held together by bonds of a covalent nature, said polymer containing a certain amount of amino groups and the average particle size of the polymer particles lying within a certain range. The preparation is intended for the X-ray examination of body cavities having outer discharge orifices. It adheres very effectively to the walls of the body cavities.
    Type: Grant
    Filed: May 21, 1976
    Date of Patent: January 17, 1978
    Assignee: Pharmacia Aktiebolag
    Inventor: Ulf Sven Erik Rothman