Details for Patent: 5,856,346

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Summary for Patent: 5,856,346

Title:	Short-acting dihydropyridines
Abstract:	Compounds of the general formula ##STR1## wherein R1 and R2 are independently selected from the group consisting of hydrogen, chloro, bromo, nitro, cyano, trifluoromethyl, and R3 and R4 are independently selected from straight or branched lower (1-5 carbon atoms) alkyl groups, and including all optical isomers, provided that when R3 is methyl and R4 is tert.-butyl, then R1 /R2 are not hydrogen/hydrogen, hydrogen/2'-trifluormethyl, 2'-chloro/3'-chloro, and when R3 is methyl and R1 /R2 is hydrogen/3'-nitro, then R4 are not methyl, ethyl, propyl, iso-propyl, tert.-butyl, processes for their preparation, pharmaceutical preparations containing them and the use of the compounds in lowering the blood pressure.
Inventor(s):	Kjell Hjalmar Andersson, Margareta Nordlander, Rolf Christer Westerlund
Assignee:	Chiesi Farmaceutici SpA
Application Number:	US08/356,224
Patent Claim Types: see list of patent claims	Use; Composition; Process;

Drugs Protected by US Patent 5,856,346

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

Foreign Priority and PCT Information for Patent: 5,856,346

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
Sweden	9303657	Nov 05, 1993

PCT Information
PCT Filed	November 03, 1994	PCT Application Number:	PCT/SE94/01031
PCT Publication Date:	May 11, 1995	PCT Publication Number:	WO95/12578

International Family Members for US Patent 5,856,346

Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
European Patent Office	0726894		C300520	Netherlands
European Patent Office	0726894		1290008-0	Sweden
European Patent Office	0726894		C00726894/01	Switzerland
European Patent Office	0726894		12C0053	France