Last Updated: November 8, 2026

Details for Patent: 3,701,771

Name: Drug Patent Intelligence for US Patent 3701771
Creator: DrugPatentWatch
License: https://www.drugpatentwatch.com/terms.php

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Summary for Patent: 3,701,771

Title:	N-(2,4,6-triiodobenzoyl)-sugar amines
Abstract:	THIS INVENTION RELATES TO NOVEL X-RAY CONTRAST AGENTS PARTICULARLY FOR USE IN THE CEREBROSPINAL CAVITIES, COMPRISING NON-IONIC ALKANOLS CARRYING AT LEAST ONE N-BONDED SECONDARY OR TETIARY AMIDE GROUP AND HAVING AT LEAST TWO HYDROXYL GROUPS AND AT LEAST ONE IODINE ATOM IN THE MOLECULE. PARTICULARLY USEFUL COMPOUNDS INCLUDE THE N-HY DROXYALKYL GROUPS, TRI- AND TETRA-IODOBENZENE CARRYING CARBAMOYL, ACYLAMINO AND/OR ACYLAMINOMETHYL SUBSTITUENTS AND HAVING AT LEAST TWO HYDROXYL GROUPS IN THE MOLECULE AND AT LEAST ONE N-HYDROXYALKYL GROUP. PARTICULARLY PREFERRED COMPOUNDS COMPRISE 2,4,6-TRIIODOBENZAMIDES WHICH MAY BE 3- AND/OR 5-SUBSTITUTED WITH A VARIETY OF GROUPS. THE COMPOUNDS ALL SHOW MARKEDLY LOW TOXICITIES AND A NUMBER SHOW VERY HIGH LEVELS OF WATER SOLUBILITY.
Inventor(s):	Torsten H O Almen, Johan Haavaldsen, Vegard Nordal
Assignee:	Norgas AS
Application Number:	US50075A
Patent Claim Types: see list of patent claims

Drugs Protected by US Patent 3,701,771

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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

International Family Members for US Patent 3,701,771

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Austria	318134	⤷ Start Trial
Belgium	752574	⤷ Start Trial
Brazil	7020080	⤷ Start Trial
Canada	935153	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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