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 40.degree. C. and 50.degree. 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: see list of patent claims	Compound;

Drugs Protected by US Patent 6,639,071

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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

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Austria	486065	⤷ Sign up for a Free Trial
Australia	6263298	⤷ Sign up for a Free Trial
Australia	738545	⤷ Sign up for a Free Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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