Patents by Inventor Bjorn Josefsson

Bjorn Josefsson 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: 5128120
    Abstract: New 9-anthrylalkyl compounds having the general formula ##STR1## wherein R is hydrogen or an alkyl group, whereby, however, not more than one of the groups R is an alkyl group; R.sub.1 is hydrogen, lower alkyl, halogen or nitro; n is an integer of from 1 to 7, whereby, however, the total number of carbon atoms in the group --CHR--(CHR).sub.n -- does not exceed 8; and X is halogen, an azide group or a succinimidyl group.The new compounds are prepared from 9-anthrylalcohols which are reacted with a compound X--CO--X wherein X is a halogen, and then optionally with compounds giving azide or succinimidyl group. The compounds are used as derivatization reagents for separation and detection purposes.Intermediates for preparation of the above defined 9-anthrylalkyl compounds wherein one R is an alkyl group are 9-anthrylalcohols with the group --CHR--(CHR).sub.n --OH, wherein one R is an alkyl group.
    Type: Grant
    Filed: February 5, 1991
    Date of Patent: July 7, 1992
    Assignee: Eka Nobel AB
    Inventors: Hans-Dieter Becker, Stefan Einarsson, Andrzej Grzegorczyk, Bjorn Josefsson, Stig S. Lagerkvist, Per L. Moller, Domingo Sanchez, Johan H. Sorensen
  • Patent number: 5015755
    Abstract: New 9-anthrylalkyl compounds having the general formula ##STR1## wherein R is hydrogen or an alkyl group, whereby, however, not more than one of the groups R is an alkyl group; R.sub.1 is hydrogen, lower alkyl, halogen or nitro; n is an integer of from 1 to 7, whereby, however, the total number of carbon atoms in the group --CHR--(CHR).sub.n -- does not exceed 8; and X is halogen, an azide group or a succinimidyl group.The new compounds are prepared from 9-anthrylalcohols which are reacted with a compound X--CO--X wherein X is a halogen, and then optionally with compounds giving azide or succinimidyl group. The compounds are used as derivatization reagents for separation and detection purposes.Intermediates for preparation of the above defined 9-anthrylalkyl compounds wherein one R is an alkyl group are 9-anthrylalcohols with the group --CHR--(CHR).sub.n --OH, wherein one R is an alkyl group.
    Type: Grant
    Filed: August 10, 1989
    Date of Patent: May 14, 1991
    Assignee: Eka Nobel AB
    Inventors: Hans-Dieter Becker, Stefan Einarsson, Andrzej Grzegorczyk, Bjorn Josefsson, Stig S. Lagerkvist, Per L. Moller, Domingo Sanchez, Johan H. Sorensen
  • Patent number: 4818704
    Abstract: The invention relates to a new chiral reagent of the formula ##STR1## wherein X is halogen, an azide group or a succinimidyl group and wherein R is an alkyl group or a trifluormethyl group. The invention further relates to a method for the derivatization, determination and preparation resolution of primary and secondary amino-containing compounds. The method comprises the steps of derivatizing the amino function by the reagent to form diastereomeric carbamates, which are determined by e.g. fluorimetry or absorptiometry after separation by liquid chromatography.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: April 4, 1989
    Assignee: Eka Nobel AB
    Inventors: Bjorn Josefsson, Stefan Einarsson, Domingo Sanchez, Per Moller