Details for 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 Claim Types: see list of patent claims

Drugs Protected by US Patent 6,004,297

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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: 6,004,297

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
Denmark	00130/98	Jan 30, 1998

International Family Members for US Patent 6,004,297

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Austria	197408	⤷ Sign Up
Australia	2265099	⤷ Sign Up
Australia	748277	⤷ Sign Up
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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