What patent is being asked about for chenodiol?
“Chenodiol” is the brand name (commonly associated with chenodeoxycholic acid) used as an oral bile-acid therapy, but “chenodiol patent” is ambiguous without knowing the patent context (drug substance, specific formulation like capsules, method-of-use claims, or a later “pediatric/label expansion” type of patent). The exact patent number, assignee, and jurisdiction depend on the specific chenodiol product and the time period you mean.
How to find the right patent for chenodiol (brand vs. generic)
Patent searches usually start with multiple naming variants because patents and regulatory filings may use different terms:
- Chenodiol (brand)
- Chenodeoxycholic acid (generic substance)
- Product/application names (the exact marketed drug name and manufacturer)
- Related uses (for example, gallstone dissolution indications)
If you tell me the country (US/EU/UK/etc.) and the manufacturer/brand you’re looking at, I can narrow the search terms that typically map to the relevant patents.
Why “the chenodiol patent” may not exist as a single, clear answer
Even if chenodiol’s active ingredient is old, there are often multiple layers of intellectual property:
- Early “new chemical entity” or composition patents on chenodeoxycholic acid (if granted in a given jurisdiction)
- Later patents on specific dosing forms (formulation, capsule content, coatings), stability, or manufacturing
- Method-of-use patents tied to a particular therapeutic claim
- Labeling/exclusivity protections tied to regulatory approvals (which are not the same thing as patents)
So searching only “chenodiol” can miss the patent family that actually matters for the use you care about.
When would chenodiol patents have expired?
For older small-molecule drugs, the original composition patents generally expire decades after filing, but the practical “can competitors launch?” timeline depends on:
- The earliest effective filing date in that jurisdiction
- Any continuation applications (for example, divisional/continuation filings)
- Whether later formulation or method-of-use patents still cover specific aspects
Without a specific patent number or assignee, I can’t give a reliable expiry date.
What to do if you want the exact patent number and expiry
To give an exact answer (patent number(s) and relevant dates), I need at least one of the following:
- Country/jurisdiction (US, EP, UK, etc.)
- Brand name and manufacturer (or NDC if US)
- The patent owner/assignee name (if you have it)
- The patent number you’ve seen (even partial)
Share any of those and I’ll map it to the likely chenodiol patent family and summarize what each patent covers (drug substance vs formulation vs method of use) and how that affects market entry.
Sources
No sources were provided in the prompt, and I don’t have enough information to identify the specific chenodiol patent(s) to cite accurately. If you share a jurisdiction or patent number, I can produce a cited, exact response.