Last Updated: June 9, 2026

Details for Patent: 3,419,578

Name: Drug Patent Intelligence for US Patent 3419578
Creator: DrugPatentWatch
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Summary for Patent: 3,419,578

Title:	Bis-chromonyl compounds
Abstract:
Inventor(s):	Fitzmaurice Colin, Lee Thomas Brian
Assignee:	Fisons Pharmaceuticals Ltd
Application Number:	US536281A
Patent Claim Types: see list of patent claims

Drugs Protected by US Patent 3,419,578

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.	Patented / Exclusive Use	Submissiondate
>Applicant	>Tradename	>Generic Name	>Dosage	>NDA	>Approval Date	>TE	>Type	>RLD	>RS	>Patent No.	>Patent Expiration	>Product	>Substance	>Delist Req.	>Patented / Exclusive Use	>Submissiondate

International Family Members for US Patent 3,419,578

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Austria	269138	⤷ Start Trial
Belgium	678175	⤷ Start Trial
Switzerland	476720	⤷ Start Trial
Switzerland	481912	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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