What is Cn111574540B (delgocitinib) on Google Patents?
Cn111574540B is a Chinese patent publication on Google Patents that is associated with delgocitinib, a small-molecule investigational drug. The document number (Cn111574540B) indicates the granted version of the patent in China, which is why you may see both published and granted variants tied to the same family on Google Patents.
Because Google Patents indexes documents by publication number, the fastest way to confirm the exact title, assignee, and scope is to search Google Patents directly for “CN111574540B” and then open the result.
How to find the exact delgocitinib claim scope in Google Patents
On the Google Patents page for CN111574540B, the key fields to check are:
- “Title” (to confirm what aspect of delgocitinib the patent covers, such as compounds, formulations, salts, or methods)
- “Assignee” (who owns the rights)
- “Claims” (the enforceable portion)
- “Description” (context and supporting examples)
- “International Classification” and “CPC” (to understand how the patent is categorized technologically)
- “Legal Events” (to see status changes, challenges, or other actions)
These sections determine what the patent actually protects, not just the compound name.
What does the “B” mean (CN111574540B) compared with other numbers?
In China patent numbering, the appended suffix often distinguishes status or publication stage. In practical terms:
- “B” documents are commonly associated with granted patent records.
- Other nearby family entries (without “B,” or with different suffixes) may correspond to earlier published applications or related family members.
If you search for “CN111574540 delgocitinib” you’ll usually see a small cluster of related records in the same patent family, and you can compare the granted claims to the earlier application claims.
Why patent families can show multiple entries for delgocitinib
Google Patents sometimes displays multiple related records because a single invention can have:
- multiple continuation or divisional applications,
- different jurisdictions,
- and updates to claims across the family.
So the delgocitinib-related protection you see on Google Patents might come from several documents that are connected through the same family.
If you tell me what you need, I can narrow it down quickly
If you paste the Google Patents link (or the patent title/assignee text shown on the page), I can help you extract:
- what delgocitinib use or chemical form is covered,
- the independent claims’ core language,
- the likely competitors/overlap areas (based on claim type),
- and how to interpret claim breadth for “do I need a license” style questions.
Sources
No sources were provided in your prompt, and I can’t access Google Patents directly from here.