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Serving hundreds of leading biopharmaceutical companies globally:

Boehringer Ingelheim
Dow
Merck
Federal Trade Commission
Colorcon
Johnson and Johnson
Cerilliant
Deloitte
UBS

Generated: April 23, 2018

DrugPatentWatch Database Preview

Details for Patent: 6,140,321

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Summary for Patent: 6,140,321
Title: Polymorphs of donepezil hydrochloride and process for production
Abstract:Donepezil hydrochloride, 1-benzyl-4-[(5,6-dimethoxy-1-indanon)-2-yl]methylpiperidine hydrochloride, is provided here in the form of four polymorphs which are stable against heat and humidity in the pharmaceutical use. They can be industrially produced. They are specified by peaks in X-ray powder diffraction pattern and absorption peaks in infrared absorption spectra in potassium bromide.
Inventor(s): Imai; Akio (Ibaraki, JP), Watanabe; Hideaki (Ibaraki, JP), Kajima; Takashi (Ibaraki, JP), Ishihama; Yasushi (Ibaraki, JP), Ohtsuka; Akiyo (Ibaraki, JP), Tanaka; Tomohide (Ibaraki, JP)
Assignee: Eisai Co., Ltd. (Tokyo, JP)
Application Number:08/774,802
Patent Claim Types:
see list of patent claims
Compound; Process; Use; Composition;

Drugs Protected by US Patent 6,140,321

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

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Foreign Priority and PCT Information for Patent: 6,140,321

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan8-146293Jun 07, 1996

International Patents Family Members for US Patent 6,140,321

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Hong Kong 1080078 ➤ Try a Free Trial
Hungary 0002270 ➤ Try a Free Trial
Hungary 227539 ➤ Try a Free Trial
Hungary 0900417 ➤ Try a Free Trial
Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration

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Serving hundreds of leading biopharmaceutical companies globally:

QuintilesIMS
Fuji
Covington
McKinsey
Deloitte
Chinese Patent Office
Baxter
Merck
Dow

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