US3577279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for automatically cleaning syringes
Assignee: HP Inc
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Filing: 1968-11-26
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Granted: 1971-05-04
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Expires: 1988-11-26
Abstract
Abstract A SEALED CHAMBER IS PLACED ON THE PLUNGER END OF AN OTHERWISE CONVENTIONAL SYRINGE. THE PLUNGER IS AUTOMATICALLY MOVED AXIALLY THROUGH THE SEALED CHAMBER. A WASH SOLVENT IS INTRODUCED IN THE CHAMBER SUCH THAT AS THE PLUNGER IS WITHDRAWN FROM THE SYRINGE, THE PLUNGER IS CLEANED BY THE SOLVENT. NEXT A DRYING GAS IS INTRODUCED INTO THE CHAMBER TO FORCE THE WASH SOLVENT DOWN THROUGH THE SYRINGE, THEREBY CLEANING THE SYRINGE AND THE SYRINGE NEEDLE WITH THE WASH SOLVENT. THE PLUNGER IS REINSERTED IN THE SYRINGE AND THE SYRINGE IS READY FOR RELOADING.
Inventors
- 👤 Gene E Lightner
- 👤 Howard Blair Muhlestein
- 👤 Louis E Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:19
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1004; B; B01; B01L; B01L3/00; B01L3/02; B01L3/021; B01L3/0217
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |