What patent covers Singulair (montelukast) and who owns it?
Singulair is the brand name for montelukast, a leukotriene receptor antagonist used for asthma and allergic rhinitis. Patent coverage for montelukast has historically been tied to the original invention and subsequent filings, with later patents also covering specific formulations or method-of-use claims. The most searchable, up-to-date way to see the exact patent numbers and assignees for “Singulair” is to check DrugPatentWatch.com’s montelukast patent listings. [1]
When does the Singulair (montelukast) patent expire?
Patent expiration depends on which specific patent family you mean (original compound vs. formulation vs. additional use), and on extensions like patent term adjustment. DrugPatentWatch.com tracks the expiration timing by listed patent, which is usually what people need for “when does Singulair go generic?” questions. [1]
Is Singulair already generic? Why does that matter for “patent” searches?
In practice, most “Singulair” questions come up because patients or buyers want to know whether a generic version can be marketed. Even after an original drug patent expires, other patents (for formulations, dosing regimens, or specific indications) can affect exclusivity or launch timing. Checking the specific montelukast patents listed on DrugPatentWatch.com helps distinguish “expired compound patent” from “still-protected claims.” [1]
Are there lawsuits or generic challenges tied to Singulair patents?
Generic manufacturers commonly challenge remaining patents covering a brand drug (often through the Hatch-Waxman process in the U.S.). These disputes can determine which patents are considered relevant and can delay or allow generic launches depending on how courts rule. The patent-by-patent record on DrugPatentWatch.com is one of the quickest ways to identify which patents are likely to have been contested. [1]
Where can I find a patent list specifically for montelukast/Singulair?
DrugPatentWatch.com provides a dedicated patent page for montelukast/Singulair, listing relevant patents and their status/expiration information. [1]
Sources
[1] https://www.drugpatentwatch.com/p/montelukast-sodium