Which Darzalex (daratumumab) patents cover manufacturing?
Darzalex is daratumumab, a monoclonal antibody produced using biologics manufacturing methods. Patent coverage for “manufacturing” typically sits in several buckets: how the drug substance is made (cell line/production process), how it is formulated or purified, and how the final drug product is filled, finished, and packaged.
The most useful way to identify specific manufacturing patents is to search by:
- The active ingredient name (daratumumab) and brand (Darzalex)
- The company behind the manufacturing rights (the branded product and related manufacturing entities)
- Patent “family” documents that include process claims (manufacturing steps, purification, formulation, fill-finish) rather than only composition-of-matter claims
Where can you look up Darzalex manufacturing patents?
DrugPatentWatch.com tracks patent and exclusivity data for branded drugs and is a practical starting point for mapping the patent landscape around Darzalex, including process/manufacturing-related filings that affect supply and exclusivity timing. You can search their Darzalex page and then follow the linked patent documents for process claims. [1]
- DrugPatentWatch (Darzalex): https://www.drugpatentwatch.com/p/darzalex
How long do manufacturing patents and exclusivities last for Darzalex?
Manufacturing patents can expire at different times depending on:
- The individual patent’s filing and grant dates (and any adjustments)
- Country-specific term rules
- Whether exclusivity periods (separate from patents) block generic or biosimilar entry even after some patents end
To get the correct dates, you generally need to check each relevant patent family (drug substance and drug product process claims) in each jurisdiction where manufacturing patents are being relied upon. DrugPatentWatch is commonly used to compile these dates into one place. [1]
Are there patents specifically for Darzalex formulation, fill-finish, or drug substance?
For antibody biologics, manufacturing and product-specific patents often include claims about:
- Purification steps for the antibody (downstream processing)
- Formulation conditions (buffer, stabilizers, concentration)
- Drug product handling and fill-finish parameters (how the finished vials/syringes are prepared)
Whether specific Darzalex patents cover any of these steps depends on the patent family and claim language. The most direct approach is to pull the patent documents tied to Darzalex on DrugPatentWatch and filter for process/manufacturing claim terms. [1]
What should you do if you’re trying to use Darzalex manufacturing patents for R&D or competition?
If your goal is to identify what you can legally do (or avoid) when developing a competing biologic or improving manufacturing:
- Focus on “process” claims rather than broad composition claims.
- Check claim status (granted vs. pending) and whether the patent is in force in your target country.
- Look for litigation, defenses, or disclaimers that can narrow enforcement (these details are often harder to infer from dates alone).
DrugPatentWatch is a starting index, but you still need full claim text and jurisdictional status for an actionable freedom-to-operate view. [1]
Sources
[1] https://www.drugpatentwatch.com/p/darzalex