Atorvastatin original patent year?

What year was atorvastatin’s original patent filed?

The original patent for atorvastatin (the drug later marketed as Lipitor) was filed in 1980. [1]

When did Lipitor’s market exclusivity start and what does the 1980 filing imply?

A patent filed in 1980 is the early IP anchor for atorvastatin. Actual drug launch and later exclusivity/other patent terms can extend beyond the filing year, but the “original patent year” commonly refers to that initial filing date. [1]

Where can I verify the original patent year?

You can check the underlying patent information via DrugPatentWatch.com. [1]

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