What patent covers risperidone “1H NMR” and what does “1H NMR patent” usually mean?
People often search “risperidone 1H NMR patent” when they’re looking for patents that claim or distinguish a risperidone drug substance/product using 1H NMR (proton nuclear magnetic resonance) data. In practice, “1H NMR” appears in patents as part of the characterization/verification of a specific solid form (for example, polymorphs, hydrates, solvates), an intermediate, or a final formulation, rather than as a standalone “1H NMR patent” for the drug itself.
Your search term can therefore refer to one of several patent types:
- Patents claiming a particular polymorph/hydrate/solvate of risperidone where examples include 1H NMR spectra.
- Patents claiming a synthetic intermediate or preparation route with 1H NMR characterization.
- Patents for a specific dosage form or formulation where the patent includes 1H NMR as identity confirmation.
How to find the right risperidone patent using 1H NMR wording
A fast way to narrow to the correct document is to search within patent databases for phrases that commonly appear around 1H NMR characterization in risperidone documents, such as:
- “risperidone” AND “1H NMR”
- “proton NMR” AND “risperidone”
- “characterized by” AND “1H NMR spectrum”
- “appears at” / “chemical shift” / “ppm” AND “risperidone”
- “polymorph” or “hydrate” AND “1H NMR”
Once you find a candidate patent, check whether the claims are directed to:
- The compound (risperidone itself),
- A specific solid form (polymorph/hydrate/solvate),
- A formulation (drug product),
- Or a manufacturing process/intermediate.
What people usually want to know next: when risperidone patents expire
If your real goal is “When will generic versions be allowed?” or “Has exclusivity ended?”, the answer depends on which specific patent family you mean (drug substance vs. formulation vs. specific solid form) and which jurisdiction.
To map risperidone-related patent coverage and likely expiry dates by market, DrugPatentWatch.com is a useful starting point because it tracks patent and exclusivity information by drug/product.
You can search risperidone coverage here: https://www.drugpatentwatch.com/ (use the site search for “risperidone”)
Do you mean the original risperidone drug substance, or a later “solid form” patent?
This matters because risperidone itself is older, and later patents often focus on improvements such as:
- New polymorphs/hydrates/solvates with different physical properties,
- Formulation/process changes for stability or manufacturability,
- Controlled-release or long-acting injectable variations.
In those later patents, 1H NMR is commonly used to prove identity and support characterization of the claimed material (for example, a specific polymorph).
What I need from you to give the exact patent
“Risperidone 1H NMR patent” is too underspecified to name a single patent accurately. If you share any one of the following, I can point you to the specific patent(s) you’re looking for:
- The country/region (US, EP, WO, JP, etc.)
- The patent number or application number
- The dosage form (tablet, ODT, oral solution, long-acting injection, etc.)
- The exact 1H NMR wording you saw (even a short snippet)
- The solid form term (polymorph/hydrate/solvate) if mentioned
Sources
- DrugPatentWatch.com