US4474734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Syringe shield and closure sterilization method
Assignee: Microbiological Applications Inc
•
Filing: 1983-07-05
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Granted: 1984-10-02
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Expires: 2003-07-05
Abstract
Abstract A pre-filled syringe-needle assembly in which the needle is covered with a shield-closure unit to assure sterility. Said shield-closure unit comprises a tube which covers the needle and a plug for said tube, one end of said tube being adapted for fitting tightly over the reduced part of the barrel of a syringe, and the other end being covered by the plug, both said end and plug covering it being adapted to provide an air-tight fit between them, said plug being sufficiently long to engage the tip of the needle inside the tube.
Inventors
- 👤 Murray S. Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:51
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/02; A61L2/04; A61L2/06; A61L2/07; A61L2/16; A61L2/20; A61L2/206; A61L2/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
A method for sterilizing a pre-filled syringe-needle assembly unit which comprises fitting onto the reduced end of the barrel of the syringe and around the needle a shield-closure unit which comprises a tube which covers the needle and a plug for said tube, one end of said tube being adapted for fitting tightly over the reduced part of the barred of a syringe and the other end being covered by the plug, both said end and plug covering it being adapted to provide an air-tight fit between them, said plug being sufficiently long to engage the tip of the needle inside the tube wherein the plug of the shield-closure unit is partially inserted into the tube to a distance where it does not come into contact with the tip of the needle, evacuating through the open end of the barrel of the syringe the pre-filled syringe-needle assembly unit which has been fitted with the shield-closure unit passing under pressure through said open end of the barrel into the unit a sterilizing gas, evacuating the unit, and after sterilization is completed, fully inserting the plug into the tube so that the tip of the needle enters into and becomes imbedded in the plug.
Claim 2
Independent Claim
202 words
A method for sterilizing a pre-filled syringe-needle assembly unit which comprises fitting onto the reduced end of the barrel of the syringe and around the needle a shield-closure unit which comprises a tube which covers the needle and a plug for said tube, one end of said tube being adapted for fitting tightly over the reduced part of the barred of a syringe and the other end being covered by the plug, both said end and plug covering it being adapted to provide an air-tight fit between them, said plug being sufficiently long to engage the tip of the needle inside the tube wherein the plug of the shield-closure unit is partially inserted into the tube to a distance where it does not come into contact with the tip of the needle, evacuating through the open end of the barrel of the syringe the pre-filled syringe-needle assembly unit which has been fitted with the shield-closure unit passing under pressure through said open end of the barrel into the unit a sterilizing gas, evacuating the unit, and after sterilization is completed, fully inserting the plug into the tube so that the tip of the needle enters into and becomes imbedded in the plug.
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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) | 1987-10-02 | 1988-04-02 | 1988-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-02 | 1992-04-02 | 1992-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-02 | 1996-04-02 | 1996-10-02 | $7700.00 | Window Closed / Lapsed |