US4941874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the administration of implants
Assignee: Hoechst AG
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Filing: 1988-08-09
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Granted: 1990-07-17
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Expires: 2008-08-09
Abstract
Abstract The invention relates to a device for the injection of implants, preferably implants "in the form of small rods" (called rods), which are used for the long-term treatment of diseases, whose essential features are the completely transparent construction, especially of the injector body (3), as well as a protecting device which prevents the plunger rod from falling out, and a protective cap (6) for the plunger rod.
Inventors
- 👤 Jurgen K. Sandow
- 👤 Wilfried De Felice
- 👤 Horst Pajunk
- 👤 Heinrich Pajunk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:22
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/02; A61M37/00; A61M37/0069
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
112 words
A device for the injection of implants comprising: an active substance container fabricated from transparent plastic, having a first end opening, a second end opening, and a cylindrical plunger channel extending between and connecting said first and second end openings, said cylindrical plunger channel including a flexible O-ring for reducing the internal diameter of said channel at a predetermined location; a cannula extending from said first end openings; a plunger rod movably disposed in said channel and extending from said second end opening, said rod having a concentric groove therein for receiving said O-ring; a first protective cap for covering said cannula; and a second protective cap for covering said plunger rod.
Claim 2
Independent Claim
112 words
A device for the injection of implants comprising: an active substance container fabricated from transparent plastic, having a first end opening, a second end opening, and a cylindrical plunger channel extending between and connecting said first and second end openings, said cylindrical plunger channel including a flexible O-ring for reducing the internal diameter of said channel at a predetermined location; a cannula extending from said first end openings; a plunger rod movably disposed in said channel and extending from said second end opening, said rod having a concentric groove therein for receiving said O-ring; a first protective cap for covering said cannula; and a second protective cap for covering said plunger rod.
Claim 3
Dependent Claim
23 words
A device as claimed in claim 1, wherein all the parts, except the plunger rod and the cannula, are fabricated from transparent plastic.
Claim 4
Dependent Claim
17 words
A device as claimed in claim 1, wherein the flexible O-ring is fabricated from polytetafluoroethylene or silicone.
Claim 5
Dependent Claim
31 words
A device as claimed in claim 1, wherein the slighe reduction of the internal diameter of the plunger channel by the O-ring is 5-40% of the diameter of the plunger channel.
Claim 6
Dependent Claim
26 words
A device as claimed in claim 1, wherein the groove in the plunger rod has a depth of 2.5-25% of the diameter of the plunger rod.
Claim 7
Dependent Claim
17 words
A device as claimed in claim 1, wherein the implants have the form of small cylindrical rods.
Claim 8
Dependent Claim
18 words
The device as claimed in claim 1 including an active substance depot disposed in the active substance container.
Claim 9
Independent Claim
106 words
A device for injection of implants, comprising: an active substance container having a first end opening, a second end opening, and a cylindrical plunger channel extending between and connecting said first and second end openings, said cylindrical plunger channel including a flexible O-ring for reducing the internal diameter of said channel at a pre-determined location; a cannula extending from said first end opening; a plunger rod movably disposed in said channel and extending from said second end opening, said rod having a concentric groove therein for receiving said O-ring; and a protective cap of covering said plunger rod to prevent inadvertent movement of said plunger rod.
Claim 10
Independent Claim
106 words
A device for injection of implants, comprising: an active substance container having a first end opening, a second end opening, and a cylindrical plunger channel extending between and connecting said first and second end openings, said cylindrical plunger channel including a flexible O-ring for reducing the internal diameter of said channel at a pre-determined location; a cannula extending from said first end opening; a plunger rod movably disposed in said channel and extending from said second end opening, said rod having a concentric groove therein for receiving said O-ring; and a protective cap of covering said plunger rod to prevent inadvertent movement of said plunger rod.
Claim 11
Dependent Claim
17 words
A device as claimed in claim 8 wherein said active substance container is made of transparent plastic.
Claim 12
Dependent Claim
16 words
A device as claimed in claim 8 further comprising a protective cap for covering said cannula.
Claim 13
Dependent Claim
30 words
A device as claimed in claim 8 further comprising a connector cap disposed on said second opening, said flexible O-ring being disposed between said connector cap and said second opening.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-16 | 1994-01-15 | 1994-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-16 | 1998-01-15 | 1998-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-16 | 2002-01-15 | 2002-07-17 | $7700.00 | Window Closed / Lapsed |