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Generated: September 22, 2019

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Details for Patent: 6,639,071

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Summary for Patent: 6,639,071
Title: Crystal Forms of (-)-6-chloro-4-cyclopropylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-ben zoxazin-2-one
Abstract:The instant invention describes a method for crystallizing (-)-6-chloro-4-cyclopropylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-ben zoxazin-2-one from a solvent and anti-solvent system and producing the crystalline product. The desired final crystal form, Form I, can be produced when using methanol or ethanol. Form II is isolated from 2-propanol and can be converted to the desired crystal form at low drying temperatures, such as between about a temperature of C. and C.
Inventor(s): Crocker; Louis S. (Belle Mead, NJ), Kukura, II; Joseph L. (Somerset, NJ), Thompson; Andrew S. (Mountainside, NJ), Stelmach; Christine (Westfield, NJ), Young; Steven D. (Lansdale, PA)
Assignee: Merck & Co., Inc. (Rahway, NJ)
Application Number:10/000,537
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 6,639,071
Patent Claim Types:
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Drugs Protected by US Patent 6,639,071

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Patented / Exclusive Use >Submissiondate

International Family Members for US Patent 6,639,071

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria 486065   Try a Free Trial
Australia 6263298   Try a Free Trial
Australia 738545   Try a Free Trial
Canada 2279198   Try a Free Trial
China 1073991   Try a Free Trial
China 1191242   Try a Free Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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