US Patent

US9173857 — Controlled dose drug delivery system

Method of Use · Assigned to Shire LLC · Expires 2026-05-12 · 0y expired

Vulnerability score 65/100 Moderate — design-around opportunities exist

What this patent protects

This patent protects a system for delivering multiple doses of amphetamine salts, using a combination of immediate-release and enteric coatings.

USPTO Abstract

A multiple pulsed dose drug delivery system for pharmaceutically active amphetamine salts, comprising a pharmaceutically active amphetamine salt covered with an immediate-release coating and a pharmaceutically active amphetamine salt covered with an enteric coating wherein the immediate release coating and the enteric coating provide for multiple pulsed dose delivery of the pharmaceutically active amphetamine salt. The product can be composed of either one or a number of beads in a dosage form, including either capsule, tablet, or sachet method for administering the beads.

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.

CodeDescriptionDrug
U-2025 —
U-2025 —
U-2025 —
U-2025 —

Patent Metadata

Patent number
US9173857
Jurisdiction
US
Classification
Method of Use
Expires
2026-05-12
Drug substance claim
No
Drug product claim
No
Assignee
Shire LLC
Source
FDA Orange Book + USPTO grounding via Google Patents

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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