Patents by Inventor Samir Samaan

Samir Samaan 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).

  • Publication number: 20030203964
    Abstract: The invention relates to a process for producing medicaments which comprise HMG CoA reductase inhibitors in the form of their salts, characterized in that the corresponding precursors of the actual active compounds are converted with bases, which contain alkali metal or alkaline earth metal ions, in a solvent, into the active compound, and the resulting active compound-containing solution is processed into the desired administration form.
    Type: Application
    Filed: June 5, 2003
    Publication date: October 30, 2003
    Inventors: Fritz Schuckler, Karl Geisen, Norbert Pollinger, Samir Samaan
  • Publication number: 20020146454
    Abstract: The invention relates to a process for producing medicaments which comprise HMG CoA reductase inhibitors in the form of their salts, characterized in that the corresponding precursors of the actual active compounds are converted with bases, which contain alkali metal or alkaline earth metal ions, in a solvent, into the active compound, and the resulting active compound-containing solution is processed into the desired administration form.
    Type: Application
    Filed: December 16, 1999
    Publication date: October 10, 2002
    Inventors: FRITZ SCHUCKLER, KARL GEISEN, NORBERT POLLINGER, SAMIR SAMAAN
  • Patent number: 5684158
    Abstract: The invention relates to new ?3-amino!-tetrahydrocarbazole-propanoic acid esters which can be used as intermediates for the preparation of known thromboxane-antagonistic active compounds, and to a method for the purification of these active compounds.
    Type: Grant
    Filed: February 22, 1996
    Date of Patent: November 4, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Samir Samaan, Joachim Lanz, Paul Naab, Ulrich Rosentreter
  • Patent number: 5650514
    Abstract: The present invention relates to 3-substituted quinoline-5-carboxylic acid derivatives and processes for their preparation.
    Type: Grant
    Filed: July 17, 1995
    Date of Patent: July 22, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jurgen Stoltefuss, Michael Negele, Karl-Heinz Wahl, Jan-Bernd Lenfers, Samir Samaan
  • Patent number: 4782162
    Abstract: The new compounds of the formula ##STR1## in which Acyl is alkylcarbonyl optionally substituted by halogen or aryl, or arylcarbonyl, which is substituted by lower alkoxy, halogen or nitro,R.sup.1 is an alkyl or alkenyl radical, andR.sup.4 is an optionally substituted branched or straight-chain C.sub.1 -C.sub.6 -alkyl radical or a cycloalkyl radical,are produced by reacting a 2-halogenoacetylacrylic acid ester of the formula ##STR2## with an acylthiourea of the formula ##STR3## The reaction can be conducted in aqueous DMF, substantially pure Z-isomer selectively crystallizing out.
    Type: Grant
    Filed: June 9, 1986
    Date of Patent: November 1, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Boberg, Paul Naab, Samir Samaan
  • Patent number: 4658039
    Abstract: The new indole derivatives of the formula ##STR1## in which R.sup.1 and R.sup.2 are identical or different and denote hydrogen or lower alkyl,R.sup.3 denotes hydrogen, lower alkyl or halogen andR.sup.4 and R.sup.5 are identical or different and denote hydrogen, lower alkyl or optionally substituted aryl, and R.sup.4 and R.sup.5 can also represent lower alkenyl, andwhereinR.sup.2 and R.sup.5 can be linked by an alkylene bridge of the formula--CH.sub.2 --CH.sub.2 --CH.sub.2).sub.nin whichn represents the number 0 or 1, can be prepared by reacting an ammonium or phosphonium salt of the corresponding indolecarboxylic acid with a haloacetic acid allyl ester. The new compounds can be used to prepare acemetacin. The new indole derivatives possess a pharmacological action.
    Type: Grant
    Filed: November 21, 1985
    Date of Patent: April 14, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventor: Samir Samaan
  • Patent number: 4600783
    Abstract: Acemetacin is prepared by reaction of an indometacin with tert.-butyl halogenoacetate and subsequent cleavage with sulphuric acid and/or sulphonic acid.
    Type: Grant
    Filed: April 25, 1985
    Date of Patent: July 15, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Samir Samaan, Harald Horstmann
  • Patent number: 4380625
    Abstract: The invention relates to an improved process for the isolation and purification of aminoglycoside antibiotics of Formula (I) as defined herein combining selective lipophilization of the compound of Formula (I) in the crude product obtained by fermentation with controlled liquid/liquid extraction.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: April 19, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Stadler, Wolfgang Koebernick, Samir Samaan, Wolfgang Gau