Tecentriq patent expiration date?

Tecentriq is atezolizumab (an anti–PD‑L1 monoclonal antibody). Patent expiration dates depend on the specific patent and the country, and for biologics there are often multiple overlapping patents (composition of matter, methods of use, formulations, etc.), plus regulatory exclusivities.

To give you the right “expiration date,” I need one detail:

1. Which country are you asking about? (US / EU / UK / Canada / etc.)
   
2. Do you mean US market exclusivity (e.g., FDA biologics exclusivity) or the earliest patent expiration?
   
   If you tell me country (and US vs EU/UK), I can narrow it down to the earliest relevant patent/exclusivity for Tecentriq.