Last Updated: August 8, 2026

Details for Patent: 4,255,431

Name: Drug Patent Intelligence for US Patent 4255431
Creator: DrugPatentWatch
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Summary for Patent: 4,255,431

Title:	Gastric acid secretion inhibiting substituted 2-(2-benzimidazolyl)-pyridines, pharmaceutical preparations containing same, and method for inhibiting gastric acid secretion
Abstract:	The present invention relates to novel compounds of the formula wherein R1 and R2 are the same or different and are each hydrogen, alkyl, halogen, carbomethoxy, carbethoxy, alkoxy, or alkanoyl, R6 is hydrogen, methyl or ethyl, R3, R4 and R5 are the same or different and are each hydrogen, methyl, methoxy, ethoxy, methoxyethoxy or ethoxyethoxy whereby R3, R4 and R5 are not all hydrogen, and whereby when two of R3, R4 and R5 are hydrogen the third of R3, R4 and R5 is not methyl. The compounds are potent gastric acid secretion inhibitors.
Inventor(s):	Ulf K. Junggren, Sven E. Sjostrand
Assignee:	AstraZeneca AB
Application Number:	US06/027,277
Patent Claim Types: see list of patent claims	Use; Composition; Formulation; Dosage form;

Drugs Protected by US Patent 4,255,431

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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: 4,255,431

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
Sweden	7804231	Apr 14, 1978

International Family Members for US Patent 4,255,431

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
European Patent Office	0005129	⤷ Start Trial	SPC/GB99/015	United Kingdom	⤷ Start Trial
Austria	374471	⤷ Start Trial
Austria	374472	⤷ Start Trial
Austria	374473	⤷ Start Trial
Austria	375365	⤷ Start Trial
Austria	389995	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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