US3314428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Veterinary hypodermic syringe
Assignee: Individual
•
Filing: 1963-12-04
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Granted: 1967-04-18
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Expires: 1983-12-04
Abstract
No abstract record available.
Inventors
- 👤 Alvin P Johnson
- 👤 James W Kennan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:04
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/20; A61M5/204; A61D; A61D7/00; A61M5/206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A HYPODERMIC SYRINGE COMPRISING A MEDICATION CHAMBER, A POWER OPERATED PLUNGER, ONE FACE OF WHICH FORMS THE REAR WALL OF THE CHAMBER, A MAIN BORE COMMUNICATING WITH THE CHAMBER, AND A NEEDLE-PISTON ASSEMBLY MOVABLE FORWARDLY BY FLUID PRESSURE AS THE PLUNGER IS MOVED, SAID PISTON HAVING A CENTRAL BORE THROUGH WHICH MEDICATION PASSES TO THE NEEDLE, SAID NEEDLE HAVING A CYLINDRICAL HUB FITTING SNUGLY IN SAID CENTRAL BORE AND RESILIENT COUPLING MEANS FOR RESISTING SEPARATION OF THE HUB AND THE PISTON, WHEREBY THE NEEDLE AND THE PISTON ALWAYS MOVE AS A UNIT WHEN THE SYRINGE IS IN USE; SAID RESILIENT COUPLING MEANS BEING LOCATED WITHIN THE PISTON BORE AND ENGAGING THE OUTER SURFACE OF THE NEEDLE HUB.
Claim 2
Dependent Claim
117 words
A HYPODERMIC SYRINGE COMPRISING A MEDICATION CHAMBER, A POWER OPERATED PLUNGER, ONE FACE OF WHICH FORMS THE REAR WALL OF THE CHAMBER, A MAIN BORE COMMUNICATING WITH THE CHAMBER, AND A NEEDLE-PISTON ASSEMBLY MOVABLE FORWARDLY BY FLUID PRESSURE AS THE PLUNGER IS MOVED, SAID PISTON HAVING A CENTRAL BORE THROUGH WHICH MEDICATION PASSES TO THE NEEDLE, SAID NEEDLE HAVING A CYLINDRICAL HUB FITTING SNUGLY IN SAID CENTRAL BORE AND RESILIENT COUPLING MEANS FOR RESISTING SEPARATION OF THE HUB AND THE PISTON, WHEREBY THE NEEDLE AND THE PISTON ALWAYS MOVE AS A UNIT WHEN THE SYRINGE IS IN USE; SAID RESILIENT COUPLING MEANS BEING LOCATED WITHIN THE PISTON BORE AND ENGAGING THE OUTER SURFACE OF THE NEEDLE HUB.
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) | 1970-04-17 | 1970-10-17 | 1971-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-17 | 1974-10-17 | 1975-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-17 | 1978-10-17 | 1979-04-18 | $7700.00 | Window Closed / Lapsed |