CA Patent

CA2566922C — Stable crystal of 4-oxoquinoline compound

Assigned to Japan Tobacco Inc · Expires 2011-01-11 · 15y expired

What this patent protects

The present invention provides a crystal of 6-(3-chloro-2-fluorobenzyl)-1-[(S)-1-hydroxymethyl-2-methylpropyl]-7-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid, which shows a particular powder X-ray diffraction pattern of a characteristic diffraction peaks at diffraction an…

USPTO Abstract

The present invention provides a crystal of 6-(3-chloro-2-fluorobenzyl)-1-[(S)-1-hydroxymethyl-2-methylpropyl]-7-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid, which shows a particular powder X-ray diffraction pattern of a characteristic diffraction peaks at diffraction angles 2.theta. (~) as measured by powder X-ray diffractometry. The crystal of the present invention is superior in physical and chemical stability.

Drugs covered by this patent

Patent Metadata

Patent number
CA2566922C
Jurisdiction
CA
Classification
—
Expires
2011-01-11
Drug substance claim
No
Drug product claim
No
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.

Track this patent

Get a daily-checked alert when vulnerability score, expiry, classification, or assignee changes. Email, Slack, or Teams delivery. Pro: 50 watches, Free: 3.