US Patent

US8981103 — Stable crystal of 4-oxoquinoline compound

Composition of Matter · Assigned to Japan Tobacco Inc · Expires 2026-10-26 · 0y remaining

Vulnerability score 5/100 Ironclad — strong claim type, well-established, deep family

What this patent protects

This patent protects a stable crystal form of the compound 6-(3-chloro-2-fluorobenzyl)-1-[(S)-1-hydroxymethyl-2-methylpropyl]-7-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid.

USPTO Abstract

Provision of a stabilized crystal of 6-(3-chloro-2-fluorobenzyl)-1-[(S)-1-hydroxymethyl-2-methylpropyl]-7-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid (compound A). A crystal of compound A, which shows a particular X-ray powder diffraction pattern of a characteristic diffraction peaks at diffraction angles 2θ(°) as measured by X-ray powder diffractometry.

Drugs covered by this patent

Patent Metadata

Patent number
US8981103
Jurisdiction
US
Classification
Composition of Matter
Expires
2026-10-26
Drug substance claim
Yes
Drug product claim
Yes
Assignee
Japan Tobacco Inc
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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