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Generated: May 21, 2018

DrugPatentWatch Database Preview

Details for Patent: 5,985,864

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Summary for Patent: 5,985,864
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), Narabu; Yukio (Ibaraki, JP)
Assignee: Eisai Co., Ltd. (Tokyo, JP)
Application Number:08/870,394
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 5,985,864
Patent Claim Types:
see list of patent claims
Compound; Process; Use; Composition;

Drugs Protected by US Patent 5,985,864

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: 5,985,864

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

International Family Members for US Patent 5,985,864

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria 230396 ➤ Try a Free Trial
Austria 445603 ➤ Try a Free Trial
Australia 1153097 ➤ Try a Free Trial
Australia 2979297 ➤ 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:

Chinese Patent Office
US Department of Justice
Healthtrust
Medtronic
Cipla
Chubb
Argus Health
Harvard Business School
Accenture

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