What is CN101919864A about (and how does it relate to tolvaptan)?
CN101919864A is a Chinese patent application that covers a formulation approach using a cyclodextrin complex with tolvaptan. In practice, patents like this usually target problems seen with poorly water-soluble drugs by using cyclodextrin to improve solubility, dissolution rate, and/or stability, which can translate into better oral bioavailability or more consistent performance.
Why would a cyclodextrin–tolvaptan patent matter commercially?
A cyclodextrin-based formulation can be important if it:
- improves dissolution for a drug that has solubility limits (tolvaptan is commonly discussed in that context in formulation IP),
- supports a new dosage form or manufacturing process,
- creates a differentiated product that can be defended via formulation patent coverage.
Is CN101919864A the same as tolvaptan’s active-ingredient patent?
Usually, no. Active-ingredient patents typically protect the compound itself (or specific processes to make it). A cyclodextrin–tolvaptan patent like CN101919864A typically protects a specific formulation, inclusion complex, or composition, which can provide separate (and sometimes later) protection even after earlier compound patents expire.
How do you use CN101919864A to check freedom to operate (FTO)?
To assess whether CN101919864A blocks or affects a generic or competitor product, you would normally check:
- the exact claimed cyclodextrin type (alpha/beta/gamma, substituted variants),
- the specific complex ratio or preparation method,
- whether the claims cover the same strength/dosage form,
- whether there are claim limitations that a different formulation could avoid.
In real FTO work, the claim text and examples matter as much as the general “cyclodextrin with tolvaptan” description.
Where can I verify details like assignee, priority date, and claim scope?
DrugPatentWatch.com often indexes patent families and related exclusivity/patent data, which can help confirm whether CN101919864A is tied to a specific assignee and how it maps to other filings. You can search the site for “tolvaptan cyclodextrin” and related patent numbers:
- DrugPatentWatch.com (search): https://drugpatentwatch.com/
What I need from you to give a precise breakdown of CN101919864A
Your question names the patent number, but not what specific detail you want. If you share any of the following, I can be much more exact:
- the title/abstract text,
- the assignee/applicant,
- the priority date or publication date you care about,
- the exact wording of the main claim (or claim numbers).
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