You’re using a public version of DrugPatentWatch with 5 free searches available | Register to unlock more free searches. CREATE FREE ACCOUNT

Last Updated: March 28, 2024

Details for Patent: 5,575,987


✉ Email this page to a colleague

« Back to Dashboard


Summary for Patent: 5,575,987
Title: Method of producing sustained-release microcapsules
Abstract:A method of producing sustained-release microcapsules containing a biologically active substance from an W/O emulsion comprising an inner aqueous phase containing said biologically active substance and an external oil phase containing a biodegradable polymer, characterized in that microcapsules formed on microencapsulation of said biologically active substance with said biodegradable polymer are heated at a temperature not lower than the glass transition temperature of said biodegradable polymer but not so high as to cause aggregation of the microcapsules. This method enables the production of very useful sustained release microcapsules adapted to release a bologically active substance at a calculated rate over a protracted time period starting immediately following administration without an initial burst within one day following administration.
Inventor(s): Kamei; Shigeru (Takarazuka, JP), Yamada; Minoru (Kawanishi, JP), Ogawa; Yasuaki (Ohyamazaki-cho, JP)
Assignee: Takeda Chemical Industries, Ltd. (Osaka, JP)
Application Number:08/562,634
Patent Claim Types:
see list of patent claims
Dosage form;

Drugs Protected by US Patent 5,575,987

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: 5,575,987

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan4-234821Sep 02, 1992

International Family Members for US Patent 5,575,987

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria 175345 ⤷  Try a Trial
Canada 2105374 ⤷  Try a Trial
Germany 69322917 ⤷  Try a Trial
Denmark 0586238 ⤷  Try a Trial
European Patent Office 0586238 ⤷  Try a Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

Make Better Decisions: Try a trial or see plans & pricing

Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.