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Details for Patent: 6,172,233

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Patent 6,172,233 protects PAXIL and is included in one NDA. There has been one Paragraph IV challenge on Paxil.

Protection for PAXIL has been extended six months for pediatric studies, as indicated by the *PED designation in the table below.

This patent has one patent family member in one country.

This patent has expired prematurely due to non-payment of maintenance fees. See details below.

Summary for Patent: 6,172,233

Title: Process for making paroxetine
Abstract:Compounds of structure (2) are prepared by reaction of an arecoline analogue of structure(4) with an organometallic compound containing an X-substituted phenyl group, such as a compound of structure (3). ##STR1## Suitably the compound of structure (3) is a Grignard reagent, where M is magnesium and Y is a halogen atom, or M may be a Group II metal and Y is a halogen atom or a second X-substituted phenyl group. When structure (3) is a Grignard reagent, the reaction is carried out either in a suitable non-ether solvent, typically a hydrocarbon or a non-reactive chlorinated hydrocarbon, or in a mixture of such a solvent with diethyl ether. Compounds of structure (2) are important intermediates in the preparation of inter alia paroxetine.
Inventor(s): Ward; Neal (Tonbridge, GB)
Assignee: SmithKline Beecham plc (Brentford, GB)
Application Number:09/007,475
Patent Claim Types:
see list of patent claims
Compound; Process;
Patent Metrics:
Source: PatentQuant.com
Field: Organic fine chemistry
Back Citations: 11th percentile
Forward Citations: 0th percentile

Applicant Tradename Generic Name Dosage NDA Approval Date Type RLD Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use
Apotex Technologies
paroxetine hydrochloride
CAPSULE;ORAL020885-001Oct 9, 1998DISCNNo6,172,233*PED► subscribeY
Apotex Technologies
paroxetine hydrochloride
CAPSULE;ORAL020885-002Oct 9, 1998DISCNNo6,172,233*PED► subscribeY
Apotex Technologies
paroxetine hydrochloride
CAPSULE;ORAL020885-003Oct 9, 1998DISCNNo6,172,233*PED► subscribeY
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Premature patent expiration for: 6,172,233

Expiration due to failure to pay maintenance fee

Patent Number Expiration Date
6,172,233 January 09, 2013

Foreign Priority and PCT Information for Patent: 6,172,233

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
United Kingdom9700690Jan 15, 1997

International Patent Family for Patent: 6,172,233

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
United Kingdom9700690► subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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