Last Updated: June 10, 2026

Details for Patent: 3,681,500

Name: Drug Patent Intelligence for US Patent 3681500
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Summary for Patent: 3,681,500

Title:	Spray compositions for treatment of obstructive disorders of the respiratory tract and methods therefor
Abstract:	Inhalation spray compositions for the treatment of obstructive disorders of the respiratory tract, comprising as an active ingredient a physiologically compatible quaternary salt of Nisopropyl-N-methyl-nortropine tropic acid ester, optionally in combination with a mucolytic and/or a bronchospasmolytic.
Inventor(s):	Karl Zeile, Werner Schulz, Rolf Banholzer, Helmut Wick
Assignee:	CH Boehringer Sohn AG and Co KG , Boehringer Ingelheim GmbH
Application Number:	US94951A
Patent Claim Types: see list of patent claims

Drugs Protected by US Patent 3,681,500

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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: 3,681,500

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
	P 19 62 496.5	Dec 12, 1969

International Family Members for US Patent 3,681,500

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Belgium	760251	⤷ Start Trial
Canada	942671	⤷ Start Trial
Germany	1962496	⤷ Start Trial
Spain	386308	⤷ Start Trial
France	2081353	⤷ Start Trial
United Kingdom	1333767	⤷ Start Trial
Ireland	34806	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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