Method for the production of crystalline forms and crystalline forms of optical enantiomers of modafinil

CAFC
  • US 7,132,570 B2
  • Filed: 12/18/2003
  • Issued: 11/07/2006
  • Est. Priority Date: 12/20/2002
  • Status: Expired due to Fees
First Claim
Patent Images

1. A laevorotatory enantiomer of modafinil in a polymorphic form that produces a powder X-ray diffraction spectrum comprising intensity peaks at the interplanar spacings:

  • 8.54, 4.27, 4.02, 3.98 (Å

    ).

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