What patent covers lesinurad synthesis?
Based on the information provided, there are no details about a specific “lesinurad synthesis” patent number, assignee, jurisdiction, or claims set. Without those identifiers, it’s not possible to say which patent covers the synthesis of lesinurad or what compounds/processes it protects.
How to identify the “lesinurad synthesis” patent yourself (fastest path)
To find the exact patent that covers lesinurad synthesis, search patent databases for combinations of:
- “lesinurad” (as a compound name or drug name)
- “process for preparing” / “preparation” / “synthesis”
- “intermediate” / “intermediate compound”
- and the patent family holder (often the original developer, if known)
Typical places to check:
- Google Patents (best for quick family and full-text claim searching)
- Espacenet (EPO family data)
- USPTO / WIPO Patentscope (by jurisdiction or assignee)
Which details change the right answer?
The correct “lesinurad synthesis patent” can differ depending on what you mean by synthesis, such as:
- making lesinurad itself (the active pharmaceutical ingredient, API)
- making key intermediates used in the API route
- specific steps/conditions (reagents, temperatures, catalysts, solvents, purification)
- polymorph/crystal form production (sometimes treated as process-related)
Also, different jurisdictions and patent families can cover different parts of the manufacturing chain.
What I need from you to pinpoint the exact patent
Send any one of the following and I can narrow it to the specific synthesis-related patent(s):
- the patent number you have in mind
- the assignee/company name
- the country/jurisdiction (US, EP, WO, JP, etc.)
- a link to the patent page
- or the exact wording you saw (even a fragment of a claim)
If your goal is freedom-to-operate (FTO)
If you’re trying to assess whether lesinurad synthesis is still covered, you’ll usually need:
- the relevant patent family members (not just one patent)
- their priority/filing dates and current status (granted/expired/terminated)
- whether there’s a continuing process claim, intermediate claim, or formulation/polymorph claim that still has active coverage
If you tell me whether you want “which patent exists” vs “is it still in force,” I can tailor the search approach.
Sources
No sources were provided with your question, so none can be cited.