Last Updated: September 24, 2026

Details for Patent: 5,716,338

Name: Drug Patent Intelligence for US Patent 5716338
Creator: DrugPatentWatch
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Summary for Patent: 5,716,338

Title:	Dual-chamber type injection cartridge with bypass connection
Abstract:	An injection cartridge (1) of the dual-chamber type having a bypass connection (12) between its two chambers (9, 10) which is arranged such that the interior wall of the cartridge is modified in a predetermined area in such a way that the movable wall (11) between the two chambers does not seal completely against the interior wall in said area. The modification of the wall is arranged as a plurality of lands and grooves (12) which have a direction that is inclined in relation to the longitudinal axis of the cartridge barrel.
Inventor(s):	Birger Hjertman, Bohdan Pavlu
Assignee:	Pfizer Health AB
Application Number:	US08/448,607
Patent Claim Types: see list of patent claims	Delivery;

Drugs Protected by US Patent 5,716,338

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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: 5,716,338

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
Sweden	9303453	Oct 20, 1993

PCT Information
PCT Filed	October 10, 1994	PCT Application Number:	PCT/SE94/00949
PCT Publication Date:	April 27, 1995	PCT Publication Number:	WO95/11051

International Family Members for US Patent 5,716,338

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Austria	198992	⤷ Start Trial
Austria	246943	⤷ Start Trial
Australia	683947	⤷ Start Trial
Australia	8007694	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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