US11771624 — Sustained release drug delivery systems with reduced impurities and related methods
Method of Use · Assigned to Durect Corp · Expires 2041-01-12 · 15y remaining
What this patent protects
This patent protects sustained release drug delivery systems with reduced impurities for various active pharmaceutical agents, including Bupivacaine Hydrochloride And Epinephrine.
USPTO Abstract
The present disclosure relates to sustained release drug delivery systems. In some cases, a composition comprises an active pharmaceutical agent; at least one of sucrose acetate isobutyrate and a polyorthoester; an organic solvent; and 2,6-dimethylaniline, wherein the 2,6-dimethylaniline is present at a level less than 500 ppm. In some cases, a composition comprises N-oxide of active pharmaceutical agent at a level less than 1 wt %, based on weight of the composition. In some case, a composition comprises metal present at a level less than 5 ppm. Dosage forms and methods are also provided.
Drugs covered by this patent
FDA Patent Use Codes
When a patent is method-of-use, FDA lists it once per applicable indication ("U-code"). Each U-code carves out a specific therapeutic use that generic filers must either license or design around.
| Code | Description | Drug |
|---|---|---|
U-3724 |
— | Bupivacaine Hydrochloride And Epinephrine |
Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.
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