Details for Patent: 6,245,911
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Summary for Patent: 6,245,911
| Title: | Donepezil polycrystals and process for producing the same |
| Abstract: | The present invention provides novel polymorphic crystals (A) to (C) having excellent handling properties and an extremely low content of residual solvent of donepezil used as a precursor for production of donepezil hydrochloride having an excellent action as a medicament, and an industrial process for producing the same. Further, the novel polymorphic crystals (A) to (C) according to the present invention are characterized by the powder X-ray diffraction pattern and/or IR absorption peaks of donepezil represented by the following formula: ##STR1## |
| Inventor(s): | Imai; Akio (Ibaraki, JP), Ichinohe; Toshiyuki (Ibaraki, JP), Endo; Takashi (Ibaraki, JP), Tsurugi; Tomio (Ibaraki, JP), Uemura; Makoto (Ibaraki, JP) |
| Assignee: | Eisai Co., Ltd. (Tokyo, JP) |
| Application Number: | 09/555,807 |
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Patent Claim Types: see list of patent claims | Compound; Process; |
Drugs Protected by US Patent 6,245,911
| 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: 6,245,911
| Foriegn Application Priority Data | ||
| Foreign Country | Foreign Patent Number | Foreign Patent Date |
| Japan | 9-336165 | Dec 05, 1997 |
| PCT Information | |||
| PCT Filed | December 01, 1998 | PCT Application Number: | PCT/JP98/05405 |
| PCT Publication Date: | June 17, 1999 | PCT Publication Number: | WO99/29668 |
International Family Members for US Patent 6,245,911
| Country | Patent Number | Estimated Expiration | Supplementary Protection Certificate | SPC Country | SPC Expiration |
|---|---|---|---|---|---|
| Austria | 260896 | ⤷ Sign Up | |||
| Germany | 69822218 | ⤷ Sign Up | |||
| Denmark | 1048653 | ⤷ Sign Up | |||
| European Patent Office | 1048653 | ⤷ Sign Up | |||
| Spain | 2218869 | ⤷ Sign Up | |||
| Portugal | 1048653 | ⤷ Sign Up | |||
| World Intellectual Property Organization (WIPO) | 9929668 | ⤷ Sign Up | |||
| >Country | >Patent Number | >Estimated Expiration | >Supplementary Protection Certificate | >SPC Country | >SPC Expiration |
