Patents by Inventor Hakan Drevin

Hakan Drevin 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).

  • Telephone plug system
    Patent number: 7023982
    Abstract: A telephone plug system includes a jack body having one end adapted to be inserted into standard wall telephone jacks, having at least one receiving socket at another end adapted to receive a conventional plug which is attached to a telephone line operated device. One plug is selected as host plug and at least one as slave plug, whereby the host plug controls a slave plug regarding receiving calls such as speech, facsimile, data etc.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: April 4, 2006
    Assignee: Skabboren AB
    Inventors: Agneta Grandin-Drevin, Anders Drevin, Håkan Drevin
  • HIV antibody assays comprising p24-gp41 chimeric antigens
    Patent number: 5470720
    Abstract: The present invention relates to a DNA segment encoding a recombinant HIV p24 protein or HIV p24-gp41 fusion protein and a recombinant DNA (rDNA) molecule capable of expressing either protein. Cells transformed with the rDNA, methods for producing the fusion protein and diagnostic methods and systems using the fusion protein are also described.
    Type: Grant
    Filed: April 20, 1993
    Date of Patent: November 28, 1995
    Assignee: Pharmacia Genetic Engineering Inc.
    Inventors: Torsten B. Helting, Hakan Drevin, Michael F. Nunn
  • Enzyme activity determinations method characterized by the using of substrates whose fluorescent properties differs those of the converted products
    Patent number: 5252462
    Abstract: The method for demonstrating the presence of an activity of an enzyme by(a) incubating said enzyme with a fluorogenic substrate A which is converted by the enzyme to a product B differing from A in respect to its fluorescent properties, A and/or B carrying a chromophore which is a triplet sensitizer having a triplet energy level above the excitation energy level of a lanthanide ion selected from the group consisting of Eu.sup.3+, Tb.sup.3+, Dy.sup.3+ and Sm.sup.3+ and which is capable of chelating said lanthanide ion by means of an oxygen or nitrogen atom in said chromophore, and that B differs from A either by(i) carrying a different chromophore, or(ii) having a different chelating ability, and(b) measuring the change in fluorescence caused by said enzyme.
    Type: Grant
    Filed: January 5, 1990
    Date of Patent: October 12, 1993
    Assignees: Pharmacia AB, Wallac Oy
    Inventors: Hakan Drevin, Anna T. Martin, Jan Carlsson, Sven O. Oscarsson, Timo Lovgren, Ilkka Hemmila, Marek Kwiatkowski
  • Methods and systems for producing HIV antigens
    Patent number: 5204259
    Abstract: The present invention relates to a DNA segment encoding a recombinant HIV p24 protein or HIV p24-gp41 fusion protein and a recombinant DNA (rDNA) molecule capable of expressing either protein. Cells transformed with the rDNA, methods for producing the fusion protein and diagnostic methods and systems using the fusion protein are also described.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: April 20, 1993
    Assignee: Pharmacia Genetic Engineering, Inc.
    Inventors: Torsten B. Helting, Hakan Drevin, Michael F. Nunn