Sephience generics — when can they launch?
Sephience (SEPIAPTERIN) · Ptc Therap · 8 active US patents · 0 expired
Where Sephience sits in the generic timeline
Long-dated protection: earliest active US patent for Sephience extends to 2038 (~12 years out). Generic competition is at least 4 years away. Lifecycle moves (new formulations, label extensions, combination filings) typically execute 18-36 months ahead of cliff.
Under US Hatch-Waxman, a generic enters via an ANDA (Abbreviated New Drug Application) and may file with one of four Paragraph IV certifications attacking the brand's listed patents. If the brand sues within 45 days, a 30-month FDA approval stay is triggered. First Para IV filer typically gets 180-day market exclusivity.
Patent estate by type — active patents
Method-of-use patents only carve out specific indications; generics can launch with a "skinny label" omitting those uses. Composition-of-matter patents block the molecule itself.
- Method of Use — 8 patents
FDA U-codes carved out by Sephience patents
Method-of-use patents are listed against specific FDA Patent Use Codes ("U-codes") representing carved-out indications. Generics can launch with a label that omits these uses.
| U-code | Description |
|---|---|
U-4251 | (no description) |
U-4250 | (no description) |
Sample patent estate
Showing 6 of 8 active US patents. View full estate on the Sephience drug page →
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This patent protects crystalline forms of sepiapterin, including free base polymorphs and salts, and methods for preparing them.USPTO title: Polymorphs of sepiapterin and salts thereof
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This patent protects crystalline forms of sepiapterin, including free base polymorphs and salts, and methods for preparing them.USPTO title: Polymorphs of sepiapterin and salts thereof
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This patent protects pharmaceutical compositions containing sepiapterin and methods for treating tetrahydrobiopterin-related disorders, such as tetrahydrobiopterin deficiency or phenylketonuria.USPTO title: Pharmaceutical compositions comprising sepiapterin and uses thereof
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This patent protects pharmaceutical compositions containing sepiapterin and methods for treating tetrahydrobiopterin-related disorders, such as tetrahydrobiopterin deficiency or phenylketonuria.USPTO title: Pharmaceutical compositions comprising sepiapterin and uses thereof
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This patent protects pharmaceutical compositions containing sepiapterin and methods for treating tetrahydrobiopterin-related disorders, such as tetrahydrobiopterin deficiency or phenylketonuria.USPTO title: Pharmaceutical compositions comprising sepiapterin and uses thereof
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This patent protects pharmaceutical compositions containing sepiapterin and methods for treating tetrahydrobiopterin-related disorders, such as tetrahydrobiopterin deficiency or phenylketonuria.USPTO title: Pharmaceutical compositions comprising sepiapterin and uses thereof
Sources
- FDA Orange Book — patents listed against Sephience (NDA filed 2025)
- Sephience drug profile — full patent estate, indications, clinical trials, pricing
- Ptc Therap patent portfolio
- Patent cliff 2038 — every drug losing US exclusivity that year
Patent term extensions (PTR, pediatric exclusivity), Hatch-Waxman 30-month stays, and FDA regulatory exclusivity (NCE/ODE/PED) may shift the effective generic entry date. Not legal advice.
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