Patents by Inventor Eugen Schaich

Eugen Schaich 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).

  • Process for preparing a maltoheptaose derivative
    Patent number: 5108913
    Abstract: .alpha.-Amylase is determined by the enzymatic splitting of an .alpha.-amylase substrate and measurement of a fission product, wherein there is used as a substrate a maltoheptaose compound of the formula ##STR1## wherein R is a glucoside, phenylglucoside, mononitrophenylglucoside, dinitrophenylglucoside, sorbitol or gluconic acid group. Reagents comprising such a substrate and a system for the determination of a fission product formed from the amylase substrate by .alpha.-amylase, are also provided. A process for the preparation of a maltoheptaose will Bacillus macerans amylase, free of p-nitrophenyl-alpha-glucoside splitting activity is disclosed.
    Type: Grant
    Filed: June 27, 1990
    Date of Patent: April 28, 1992
    Assignee: Boehringer Mannheim GmbH
    Inventors: Elli Rauscher, Ulrich Neumann, August W. Wahlefeld, Alexander Hagen, Wolfgang Gruber, Joachim Ziegenhorn, Eugen Schaich, Ulfert Deneke, Michal Gerhard, Gunter Weimann
  • Method and reagent compositions for determining alpha amylase using a blocked and labeled substrate
    Patent number: 4818692
    Abstract: The present invention provides compounds of the general formula: ##STR1## in which R and R.sub.1, independently of one another, each represent a straight-chained or branched alkyl or alkoyl radical containing up to 6 carbon atoms or a phenyl radical or R and R.sub.1 together also form a methylene bridge, the hydrogen atoms of which, independently of one another, can each be substituted by an alkyl radical containing up to 5 carbon atoms or a phenyl radical, R.sub.2 represents an oligoglucoside residue containing 2 to 7 glucose units and X is a hydrogen atom or an optically-determinable residue.The present invention also provides a process for the preparation of these compounds.
    Type: Grant
    Filed: July 1, 1987
    Date of Patent: April 4, 1989
    Assignee: Boehringer Mannheim GmbH
    Inventors: Elli Rauscher, Eugen Schaich, Ulrich Neumann, August Wahlefeld, Wolfgang Gruber, Bernhard Empl
  • Heptaose compounds and preparation thereof
    Patent number: 4709020
    Abstract: The present invention provides compounds of the general formula: ##STR1## in which R and R.sub.1, independently of one another, each represent a straight-chained or branched alkyl or alkoyl radical containing up to 6 carbon atoms or a phenyl radical or R and R.sub.1 together also form a methylene bridge, the hydrogen atoms of which, independently of one another, can each be substituted by an alkyl radical containing up to 5 carbon atoms or a phenyl radical, R.sub.2 represents an oligoglucoside residue containing 2 to 7 glucose units and X is a hydrogen atom or an optically-determinable residue.The present invention also provides a process for the preparation of these compounds.
    Type: Grant
    Filed: August 3, 1984
    Date of Patent: November 24, 1987
    Assignee: Boehringer Mannheim GmbH
    Inventors: Elli Rauscher, Eugen Schaich, Ulrich Neumann, August Wahlefeld, Wolfgang Gruber, Bernhard Empl
  • Process and reagent for the determination of .alpha.-amylase
    Patent number: 4544631
    Abstract: .alpha.-Amylase is determined by the enzymatic splitting of an .alpha.-amylase substrate and measurement of a fission product, wherein there is used as a substrate a maltoheptaose compound of the formula ##STR1## wherein R is a glucoside, phenylglucoside, mononitrophenylglucoside, dinitrophenylglucoside, sorbitol or gluconic acid group. Reagents comprising such a substrate and a system for the determination of a fission product formed from the amylase substrate by .alpha.-amylase, are also provided.
    Type: Grant
    Filed: October 16, 1981
    Date of Patent: October 1, 1985
    Assignee: Boehringer Mannheim GmbH
    Inventors: Elli Rauscher, Ulrich Neumann, August W. Wahlefeld, Alexander Hagen, Wolfgang Gruber, Joachim Ziegenhorn, Eugen Schaich, Ulfert Deneke, Gerhard Michal, Gunter Weimann
  • Method of preparing tissue thromboplastin
    Patent number: 4416812
    Abstract: A tissue thromboplastin preparation which is sensitive to coagulation factor VII, is prepared from acetone dry powder mammalian tissue, by extraction with a salt solution containing 1 to 20 mmol/1 of calcium ions and, if desired, a surface active agent, after which the extract maybe dried.
    Type: Grant
    Filed: December 1, 1982
    Date of Patent: November 22, 1983
    Assignee: Boehringer Mannheim GmbH
    Inventors: Udo Becker, Eugen Schaich, Manfred Weigert