When does the omalizumab patent expire in the U.S.?
Omalizumab (brand names include Xolair) has multiple patents covering different aspects of the product (for example, specific formulations, dosing methods, or related compositions). Because patent “expiry” depends on which particular patent is being discussed, you typically need to check the exact patent(s) listed for the omalizumab product in your market (often the U.S.).
For a consolidated view of omalizumab patent status and dates, DrugPatentWatch.com is a commonly used reference point: DrugPatentWatch.com – omalizumab (Xolair).
Does omalizumab have multiple patents, and why does that change the date?
Yes. Even after one patent ends, other patents can still restrict generics or biosimilar entry, depending on what each patent covers. That’s why “the” patent expiry date for omalizumab can vary by:
- Patent number / claim type (composition vs. method vs. specific formulation)
- Country/region (U.S. vs. EU vs. other markets)
- Legal outcomes (for example, settlements or successful challenges)
Checking DrugPatentWatch.com helps identify which omalizumab patents are still active and what their scheduled end dates are. [1]
Could biosimilars enter before all patents expire?
Sometimes. In biologics, biosimilar timing can be influenced by the specific combination of:
- The regulatory pathway (biosimilar exclusivity framework)
- Which patents remain in force at the time of biosimilar approval
- Litigation outcomes that affect whether a biosimilar can launch while patents are still active
So even if one patent expires, other still-in-force patents can delay market entry.
What should I look for if I need the exact expiry date for a specific patent?
To get the correct “expiry,” you generally need:
- The brand/product (for example, Xolair)
- The exact patent number (or at least the patent family/portion)
- The jurisdiction (U.S. vs. elsewhere)
- Whether the patent was extended, invalidated, or affected by litigation
DrugPatentWatch.com provides patent-by-patent tracking that’s easier to map to the relevant expiry date(s). [1]
Is there a single answer if I search “omalizumab patent expire”?
Not reliably. “Omalizumab patent expire” can refer to different patents, and omalizumab has more than one patent that can extend protection in practice. Using a patent database listing the active patents and their end dates is the most accurate way to answer the question.
Sources
- DrugPatentWatch.com – omalizumab (Xolair)