Last Updated: August 2, 2026

CHIBROXIN Drug Patent Profile

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Which patents cover Chibroxin, and what generic alternatives are available?

Chibroxin is a drug marketed by Merck and is included in one NDA.

The generic ingredient in CHIBROXIN is norfloxacin. There are seven drug master file entries for this compound. Additional details are available on the norfloxacin profile page.

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Summary for CHIBROXIN

US Patents:	0
Applicants:	1
NDAs:	1

US Patents and Regulatory Information for CHIBROXIN

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Glossary

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Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Exclusivity Expiration
Merck	CHIBROXIN	norfloxacin	SOLUTION/DROPS;OPHTHALMIC	019757-001	Jun 17, 1991		DISCN	No	No	⤷ Start Trial	⤷ Start Trial				⤷ Start Trial
>Applicant	>Tradename	>Generic Name	>Dosage	>NDA	>Approval Date	>TE	>Type	>RLD	>RS	>Patent No.	>Patent Expiration	>Product	>Substance	>Delist Req.	>Exclusivity Expiration

International Patents for CHIBROXIN

See the table below for patents covering CHIBROXIN around the world.

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Country	Patent Number	Title	Estimated Expiration
Australia	3271378		⤷ Start Trial
Australia	512940		⤷ Start Trial
Belgium	863429		⤷ Start Trial
Canada	1178961	DERIVES DE L'ACIDE QUINOLINE-CARBOXYLIQUE (QUINOLINE CARBOXYLIC ACID DERIVATIVE)	⤷ Start Trial
Germany	2804097		⤷ Start Trial
France	2391210		⤷ Start Trial
>Country	>Patent Number	>Title	>Estimated Expiration

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