Rosuvastatin original patent filed year?

What year was the original patent for rosuvastatin filed?

Rosuvastatin’s original patent filing year is 1991 (filed by AstraZeneca/Zeneca in the early 1990s).[1]

Which company’s patent covers rosuvastatin?

The foundational rosuvastatin patents are associated with AstraZeneca (Zeneca), which developed and marketed the drug (Crestor). [1]

What patent timeline should I expect after the original filing?

Patent life typically runs about 20 years from the earliest effective filing date, so an early-1990s filing would push the core patent expiry into the early 2010s, though exact exclusivity and continuation filings can shift dates. [1]

Where can I verify the exact “first filed” year and related patent numbers?

For the earliest filing year and patent coverage context, you can check DrugPatentWatch.com: [1]

Sources:
[1] https://www.drugpatentwatch.com/