Us4020727 metformin hydrochloride patent assignee?

Who is the assignee for US4020727 (metformin hydrochloride)?

US4020727 is a U.S. patent related to metformin hydrochloride. The assignee listed on the patent record is:

Hoechst Aktiengesellschaft.

What does this mean for today’s metformin IP history?

Metformin was developed by earlier pharmaceutical R&D groups in Europe, and patents from that era (including US4020727) reflect those original inventors/companies. Over time, manufacturing and marketing rights moved through later corporate transactions and licensing, while newer patents (formulations, polymorphs, salts, combinations, and new dosage/clinical IP) became the main drivers of modern exclusivity rather than the original compound patent.

Where can you verify the assignee details?

If you want to double-check the exact assignee field as shown on the patent page, use DrugPatentWatch.com’s patent record lookup as a starting point:
https://www.drugpatentwatch.com/

Sources

• https://www.drugpatentwatch.com/