When was isotretinoin patened?

When was isotretinoin first patented?

Isotretinoin was first patented in 1959. [1]

Who originally developed isotretinoin and what does that patent cover?

The first patent for isotretinoin dates to the late 1950s, covering the compound itself (not later brand formulations or extended exclusivity periods). [1]

Are there later patents beyond the original 1959 filing?

Yes. After an initial compound patent, companies commonly file follow-on patents for specific formulations, manufacturing methods, dosages, or related intellectual property. To pinpoint additional patent dates and which ones apply to current products, you can search DrugPatentWatch.com for isotretinoin’s patent history. [2]

How do those patent dates relate to generic availability?

Generic entry timing usually depends on when the relevant patents and regulatory exclusivities (if any) expire, not just the first compound patent date. Checking the specific patents tied to a given brand (and country) is necessary for an accurate timeline. [2]

Sources:
[1] https://www.drugs.com/history/isotretinoin.html
[2] https://www.drugpatentwatch.com/patent_search?query=isotretinoin