Last Updated: May 24, 2026

Details for Patent: 4,430,343

Name: Drug Patent Intelligence for US Patent 4430343
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Summary for Patent: 4,430,343

Title:	Benzimidazole derivatives, process for the preparation thereof and pharmaceutical composition containing the same
Abstract:	Novel benzimidazole derivatives of the formula: (I) wherein R1 is an alkyl group having 1 to 3 carbon atoms, allyl group, propargyl group, or phenyl group; R2 is hydrogen atom or an alkyl group having 1 to 3 carbon atoms; and n is 2 or 3, or pharmaceutically acceptable acid addition salts thereof, which have excellent antihistaminic activities and are useful as antiallergics for various allergic diseases, and a process for the preparation thereof, and an antihistaminic composition containing the compound as an active ingredient.
Inventor(s):	Ryuichi Iemura, Tsuneo Kawashima, Toshikazu Fukuda, Keizo Ito, Takashi Nose, Goro Tsukamoto
Assignee:	Akzo Nobel NV
Application Number:	US06/436,032
Patent Claim Types: see list of patent claims	Composition; Compound;

Drugs Protected by US Patent 4,430,343

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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: 4,430,343

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
Japan	56-178804	Nov 06, 1981

International Family Members for US Patent 4,430,343

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Austria	19878	⤷ Start Trial
Germany	3271269	⤷ Start Trial
European Patent Office	0079545	⤷ Start Trial
Japan	H0224821	⤷ Start Trial
Japan	S5879983	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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