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Last Updated: February 3, 2023

Details for Patent: 6,403,616

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Summary for Patent: 6,403,616
Title: Chemical process and pharmaceutical formulation
Abstract:Process for the manufacturing of slightly soluble or less soluble alkaline salts of substituted sulphinyl heterocycles containing an imidazole moiety with formula I ##STR1## preferably alkaline salts of a proton pump inhibitor compound, wherein the process comprises the step of reacting the substituted sulphinyl heterocycle of Formula I with a source of the cation in the presence of a base, characterized by a washing step in which the prepared alkaline salt of the substituted sulphinyl compound is washed with a basic aqueous solvent mixture. The obtained bulk drug substance resulting in a bulk product that in an aqueous suspension of the substituted sulphinyl heterocycle having a pH not significantly lower than that of a saturated water solution of the pure compound prepared. Alternatively, the process for manufacturing a pharmaceutical dosage form comprising the active substance could be adjusted. For instance the pH of an aqueous suspension of the active substance is adjusted to a pH not significantly lower than that of a saturated water solution of the pure compound. The processes are preferably useful in the manufacturing of omeprazole magnesium salt or magnesium salt of one of its single enantiomers used in pharmaceutical dosage forms.
Inventor(s): Erickson; Magnus (Vastra Frolunda, SE), Gustavsson; Anders (Nykvarn, SE), Josefsson; Lars (Savedalen, SE)
Assignee: AstraZeneca AB (Sodertalje, SE)
Application Number:09/485,897
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 6,403,616
Patent Claim Types:
see list of patent claims
Compound; Process; Dosage form; Use;

Drugs Protected by US Patent 6,403,616

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

Foreign Priority and PCT Information for Patent: 6,403,616

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Sweden9803952Nov 18, 1998
Sweden9803953Nov 18, 1998
PCT Information
PCT FiledNovember 15, 1999PCT Application Number:PCT/SE99/02093
PCT Publication Date:May 25, 2000PCT Publication Number: WO00/28975

International Family Members for US Patent 6,403,616

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria 271556 See Plans and Pricing
Australia 1901700 See Plans and Pricing
Australia 770633 See Plans and Pricing
Brazil 9915421 See Plans and Pricing
Canada 2347981 See Plans and Pricing
China 100503598 See Plans and Pricing
China 1326455 See Plans and Pricing
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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