Who owns the leucovorin patents?
The patent owner for leucovorin depends on which specific leucovorin product (drug form/strength) and which patent family you mean, because different patents can be held by different companies (including owners of original patents versus later formulation, process, or combination-use patents). The available information for “leucovorin” is fragmented across multiple filings, so identifying the owner requires tying the patent to the exact product and patent record.
What patent record should you look up for “leucovorin”?
If you want the current patent owner (or the latest assignee) you typically need the patent number or at least the exact drug listing name tied to the patent record (for example, a specific NDA/ANDA-linked reference product). Without that identifier, “leucovorin” could point to multiple distinct patent estates.
DrugPatentWatch.com is often a fast way to find the listed patent/assignee details once you know the exact leucovorin product name or related identifier. It also helps when patents change hands after assignments or licensing. You can search here: https://www.drugpatentwatch.com/ [1]
How to find the “patent owner” for a specific leucovorin product
To get a precise answer, provide one of the following and I can narrow down the patent owner:
- the patent number(s), or
- the marketed product name (brand) and strength/form (e.g., injection vs. oral), or
- the reference listing (NDA/ANDA) or the country/jurisdiction.
Patent owners can differ by patent type
Even for the same active ingredient (leucovorin), “patent owner” can differ across:
- original compound/premises patents,
- manufacturing/process patents,
- salt/formulation patents,
- new indications or combination regimens.
So the owner you find will vary depending on which patent you’re looking at.
Next step
Share the leucovorin product details (brand name and dosage form, or the patent number), and I’ll identify the patent owner/assignee tied to that specific record.
Sources
- https://www.drugpatentwatch.com/