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Boehringer Ingelheim

Last Updated: February 4, 2023

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

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
Denmark00130/98Jan 30, 1998

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Serving leading biopharmaceutical companies globally:

Boehringer Ingelheim
Johnson and Johnson

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