Patent US3255752A successfully refreshed from Google Patents.
US3255752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hypodermic syringe
Assignee: Individual
•
Filing: 1965-01-28
•
Granted: 1966-06-14
•
Expires: 1985-01-28
Abstract
No abstract record available.
Inventors
- 👤 Dick Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:31
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/28; A61M5/284; A61M5/285; A61M5/286; A61M5/31; A61M5/315; A61M5/31596; A61M5/31598
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A HYPODERMIC SYRINGE COMPRISING A TUBULAR BARREL HAVING A CHAMBER WITH A CLOSED LOWER END AND AN OPEN UPPER END, A SEALED HYPODERMIC NEEDLE MOUNTED ON AND PROJECTING FROM SAID LOWER END OF SAID BARREL, A PASSAGEWAY INTERCONNECTING SAID BARREL CHAMBER AND SAID NEEDLE, A CYLINDRICAL PLUNGER HAVING A CHAMBER WITH A CLOSED LOWER END AND AN OPEN UPPER END, SAID PLUGNER BEING SLIDABLY DISPOSED AXIALLY WITHIN SAID BARREL CHAMBER AND HAVING A TRANSVERSE PORT THROUGH ITS PERIPHERAL WALL ADJACENT ITS LOWER END AND COMMUNICATING WITH SAID BARREL CHAMBER, A RESILIENT SLEEVE MOUNTD ABOUT THE OUTER PERIPHERAL SURFACE OF SAID PLUNGER ADJACENT ITS LOWER END AND SEALING SAID PORT, SAID SLEEVE SLIDABLY ENGAGING THE WALLS OF SAID BARREL CHAMBER AND RADIALLY EXPANDING ADJACENT ITS LOWER EDGE IN RESPONSE TO A DECREASE IN PRESSURE IN SAID BARREL CHAMBER ALLOWING FLUID FLOW FROM SAID PLUNGER CHAMBER THROUGH SAID PORT AND INTO SAID BARREL CHAMBER AND SEALING SAID PORT IN RESPONSE TO AN INCREASE IN PRESSURE IN SAID BARREL CHAMBER.
Claim 2
Dependent Claim
167 words
A HYPODERMIC SYRINGE COMPRISING A TUBULAR BARREL HAVING A CHAMBER WITH A CLOSED LOWER END AND AN OPEN UPPER END, A SEALED HYPODERMIC NEEDLE MOUNTED ON AND PROJECTING FROM SAID LOWER END OF SAID BARREL, A PASSAGEWAY INTERCONNECTING SAID BARREL CHAMBER AND SAID NEEDLE, A CYLINDRICAL PLUNGER HAVING A CHAMBER WITH A CLOSED LOWER END AND AN OPEN UPPER END, SAID PLUGNER BEING SLIDABLY DISPOSED AXIALLY WITHIN SAID BARREL CHAMBER AND HAVING A TRANSVERSE PORT THROUGH ITS PERIPHERAL WALL ADJACENT ITS LOWER END AND COMMUNICATING WITH SAID BARREL CHAMBER, A RESILIENT SLEEVE MOUNTD ABOUT THE OUTER PERIPHERAL SURFACE OF SAID PLUNGER ADJACENT ITS LOWER END AND SEALING SAID PORT, SAID SLEEVE SLIDABLY ENGAGING THE WALLS OF SAID BARREL CHAMBER AND RADIALLY EXPANDING ADJACENT ITS LOWER EDGE IN RESPONSE TO A DECREASE IN PRESSURE IN SAID BARREL CHAMBER ALLOWING FLUID FLOW FROM SAID PLUNGER CHAMBER THROUGH SAID PORT AND INTO SAID BARREL CHAMBER AND SEALING SAID PORT IN RESPONSE TO AN INCREASE IN PRESSURE IN SAID BARREL CHAMBER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |