Last Updated: June 26, 2026

Details for Patent: 4,957,939

Name: Drug Patent Intelligence for US Patent 4957939
Creator: DrugPatentWatch
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Summary for Patent: 4,957,939

Title:	Sterile pharmaceutical compositions of gadolinium chelates useful enhancing NMR imaging
Abstract:	Pharmaceutical compositions comprising gadolinium chelates are useful for enhancing NMR images.
Inventor(s):	Heinz Gries, Douwe Rosenberg, Hanns-Joachim Weinmann
Assignee:	Bayer Pharma AG
Application Number:	US06/876,497
Patent Claim Types: see list of patent claims	Composition; Formulation; Compound; Dosage form;

Drugs Protected by US Patent 4,957,939

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

Foreign Priority and PCT Information for Patent: 4,957,939

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
Germany	3129906	Jul 24, 1981
Germany	3302410	Jan 21, 1983
Germany	3401052	Jan 11, 1984

International Family Members for US Patent 4,957,939

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
European Patent Office	0071564	⤷ Start Trial	SPC/GB93/060	United Kingdom	⤷ Start Trial
Austria	18719	⤷ Start Trial
Austria	397465	⤷ Start Trial
Austria	52247	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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