Patents by Inventor Rakesh Ravjibhai PATEL

Rakesh Ravjibhai PATEL 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).

  • Salts of (R)-5-(2phenylsulphonylethenyl)-3-(N-methylpyrrolidin-2-ylmethyl)-1H-indole, 5-bromo-3-[(R)-1-methyl-pyrrolidin-2-ylmethyl]-1H-indole and of eletriptan
    Publication number: 20090299077
    Abstract: The present invention relates to salts of (R)-5-(2-phenylsulphonylethenyl)-3-(N-methylpyrrolidin-2-ylmethyl)-1H-indole of the formula: wherein HX is an acid selected from para-toluene sulfonic acid, benzene sulphonic acid, trifluoroacetic acid, methane sulphonic acid, formic acid and succinic acid; and to processes of preparing and using such salts.
    Type: Application
    Filed: May 22, 2009
    Publication date: December 3, 2009
    Inventors: Vinod Kumar KANSAL, Dhirenkumar N. MISTRY, Rakesh Ravjibhai PATEL, Saurabh PANDEY
  • Process for the preparation of clarithromycin
    Publication number: 20090054634
    Abstract: The present invention includes a process involving a one-pot reaction for preparing erythromycin 9-oxime salt comprising: (a) reacting erythromycin thiocyanate with an ammonium source to obtain erythromycin free base; (b) oximating the C-9 carbonyl of the erythromycin free base by reacting the erythromycin free base with triethylamine and hydroxyl amine hydrochloride to form erythromycin oxime; and (c) reacting the erythromycin oxime obtained in step (b) with an ammonium source to obtain the erythromycin 9-oxime salt.
    Type: Application
    Filed: August 11, 2008
    Publication date: February 26, 2009
    Inventors: Vinod Kumar Kansal, Dhirenkumar N. Mistry, Mitesh Gandhi, Rakesh Ravjibhai Patel