Deeper Knowledge, Faster

  • Analyze global market entry opportunities
  • Uncover prior art in expired and abandoned patents
  • Drug patents in 130+ countries

Upgrade to enjoy subscriber-only features like email alerts and data export. See the Plans and Pricing

Serving leading biopharmaceutical companies globally:

Boehringer Ingelheim
Cantor Fitzgerald
Express Scripts

Generated: November 22, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,677,191

« Back to Dashboard

Summary for Patent: 4,677,191

Title: Copolymer and method for producing the same
Abstract:A copolymer of lactic acid and glycolic acid which has a weight-average molecular weight of not less than about 5000 and a dispersity of about 1.5 to 2 is advantageously used as a biodegradable polymer for medical preparation.
Inventor(s): Tanaka; Motoaki (Urawa, JP), Ogawa; Yasuaki (Ibaraki, JP), Miyagawa; Tsutomu (Kawagoe, JP), Watanabe; Toshio (Kawagoe, JP)
Assignee: Wada Pure Chemical Ind., Ltd. (Higashi, JP) Takeda Chemical Industries, Ltd. (Higashi, JP)
Application Number:06/751,672
Patent Claim Types:
see list of patent claims
Compound; Use;

No matches for this query

Foreign Priority and PCT Information for Patent: 4,677,191

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan59-140356Jul 06, 1984

International Patent Family for Patent: 4,677,191

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Germany3567470► Subscribe
Germany3567471► Subscribe
European Patent Office0171907► Subscribe
European Patent Office0172636► Subscribe
Canada1236641► Subscribe
Canada1256638► Subscribe
Austria39936► Subscribe
Bulgaria61520► Subscribe
Austria39935► Subscribe
Hong Kong19592► Subscribe
This preview shows a limited data set
Subscribe for full access, or try a Trial

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.

Export unavailable in trial.
Subscribe for complete access.

For more information try a trial or see the database preview and plans and pricing

Serving leading biopharmaceutical companies globally:

Harvard Business School
Queensland Health
Daiichi Sankyo
Farmers Insurance

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 verifification 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.

Copyright 2002-2017 thinkBiotech LLC
ISSN: 2162-2639

Secure SSL Encrypted
Privacy and Cookies
Terms & Conditions

Follow DrugPatentWatch:

Google Plus