What patent protections exist for sparsentan, and who holds them?
The provided information does not include any patent documents, assignees, filing dates, jurisdictions, or publication numbers for sparsentan. Without those details, I can’t identify which patents cover sparsentan synthesis or who owns them.
Which sparsentan “synthesis” patents should you search for?
If you’re looking specifically for patents covering sparsentan manufacturing (often described as “process,” “preparation,” “making,” or “production” of sparsentan), searches usually focus on:
- Product/process claims for “sparsentan” and its salts (for example, where the claim language specifies the salt form made during synthesis).
- Manufacturing steps such as intermediates, coupling reactions, purification, crystallization, solvent systems, and impurity control.
- Any process improvement claims filed by different companies than the drug’s original developer.
To pinpoint the right documents, you would typically search patent databases using combinations of:
- Keywords: “sparsentan” + “process” OR “preparation” OR “manufacture” OR “intermediate” OR “crystallization”
- Chemistry terms tied to the route (if known from the literature or later regulatory submissions), plus impurity names if specified in claims.
When do sparsentan patents expire (and how does that affect generic entry)?
The provided information does not include sparsentan patent expiry dates or any listed patent families. In general, expiry depends on:
- The filing dates of the original and any continuation patents in each jurisdiction
- Patent term adjustments/extensions where applicable
- Whether there are separate patents on specific salts, polymorphs, intermediates, or manufacturing processes
- Regulatory exclusivities (which are distinct from patent expiry)
Are there challenges or litigation tied to sparsentan synthesis patents?
The provided information does not include litigation or opposition details. To determine whether synthesis/process patents are being challenged, you would typically look for:
- Court dockets and filings referencing sparsentan process patents
- Patent office oppositions (where relevant to the jurisdiction)
- Settlement agreements or amended claims mentioned in related documents
Can you share a sparsentan patent number or assignee so I can identify the synthesis patent?
If you provide any of the following, I can help you locate and summarize the exact “sparsentan synthesis” patent(s) and map them to their likely claim scope:
- A patent number (US/EU/WO), publication number, or application number
- The assignee/company name
- The country/jurisdiction you care about (US, EP, WO, JP, etc.)
- Any intermediate name or step description you’ve seen
What I need from you to answer precisely
Right now, the request is too underspecified to cite or identify specific sparsentan synthesis patents. Reply with at least one of:
1) A patent publication number (e.g., WO…, US…), or
2) The assignee/company name, or
3) The jurisdiction(s) you want (US/EP/WO/etc.), or
4) The chemical route details you’re trying to protect (intermediate name, salt form, key step).
Sources: none (no patent sources were provided in the prompt).