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Last Updated: April 25, 2024

Patent: 6,004,297

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Summary for Patent: 6,004,297

Title:	Injection syringe
Abstract:	An injection syringe comprises a housing (1), a piston rod (6) with a non-circular cross-section and an outer thread (7), a piston rod drive which includes a piston rod guide (85) mating with the cross-section of the piston rod (6), and a nut (4) which is not axially displaceable and which mates with the thread (7) of the piston rod (6) to form a self-locking thread connection. Rotation of a dose setting element (81) causes an injection button to be screwed out to project from the housing (1). When the injection button (88) is pushed axially, such axial movement is transformed, by way of the threaded coupling, into a rotation of one of the piston drive elements (85) relative to the other one (4). A unidirectional coupling between the nut member (4) and the piston rod guide (85) allows rotation in one direction by which the piston rod (6) is transported in a distal direction. The coupling has an initial reluctance to be overcome before rotation takes place, said reluctance being large enough to resist torques exerted during the dose setting.
Inventor(s):	Steenfeldt-Jensen; S.o slashed.ren (Hornb.ae butted.k, DK), Hansen; Steffen (Hiller.o slashed.d, DK)
Assignee:	Novo Nordisk A/S (Bagsvaerd, DK)
Application Number:	09/238,849
Patent Litigation and PTAB cases:	See patent lawsuits and PTAB cases for patent 6,004,297
Patent Claims:	see list of patent claims

Details for Patent 6,004,297

Glossary

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Applicant	Tradename	Biologic Ingredient	Dosage Form	BLA	Approval Date	Patent No.	Expiredate
Novo Nordisk Inc.	NOVOLOG	insulin aspart	Injection	020986	06/07/2000	⤷ Try a Trial	2018-01-30
Novo Nordisk Inc.	NOVOLOG	insulin aspart	Injection	020986	01/19/2001	⤷ Try a Trial	2018-01-30
Novo Nordisk Inc.	NOVOLOG	insulin aspart	Injection	020986	04/23/2004	⤷ Try a Trial	2018-01-30
>Applicant	>Tradename	>Biologic Ingredient	>Dosage Form	>BLA	>Approval Date	>Patent No.	>Expiredate

International Patent Family for US Patent 6,004,297

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Country	Patent Number	Estimated Expiration
Austria	197408	⤷ Try a Trial
Australia	2265099	⤷ Try a Trial
Australia	748277	⤷ Try a Trial
>Country	>Patent Number	>Estimated Expiration

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