Patents by Inventor Leif Erik Aurell

Leif Erik Aurell 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).

  • Chromogenic enzyme substrates
    Patent number: 4028318
    Abstract: Chromogenic substrates for serine proteases, represented by the formula:R.sub.1 -A.sub.1 -A.sub.2 -Gly-Arg-NH-R.sub.2or its salts, where R.sub.1 is hydrogen or alkanoyl having from 1 to 12 carbon atoms or cyclohexylcarbonyl or benzoyl or benzoyl substituted with one or two halogen atoms, methylamine or phenyl groups or benzene sulphonyl or toluenesulphonyl, R.sub.2 is nitrophenyl or naphthyl or nitronaphthyl or methoxynaphthyl or quinolyl or nitroquinolyl, A.sub.1 is a single bond or one of the amino acids Gly, Ala, Val, Leu, Ileu, Pro, Met, Phe or Tyr, and A.sub.2 is one of the amino acids Glu, Gln, Asp, or Asn.
    Type: Grant
    Filed: November 14, 1975
    Date of Patent: June 7, 1977
    Assignee: A B Kabi
    Inventors: Leif Erik Aurell, Karl Goran Claeson