US3340872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hypodermic syringe with distendable piston
Assignee: Individual
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Filing: 1964-11-24
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Granted: 1967-09-12
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Expires: 1984-11-24
Abstract
No abstract record available.
Inventors
- 👤 Thomas S Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:51
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/24; A61M2005/2403; A61M2005/2407; A61M2005/2485; A61M2005/2496; A61M5/31; A61M2005/3112; A61M5/315; A61M5/31511
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A HYPODERMIC SYRINGE COMPRISING A TUBULAR BODY MEMBER, A HEAD PORTION HAVING AN OPENING THEREIN AND DISPOSED PROXIMATE ONE END OF THE TUBULAR BODY, MEANS DISPOSED PORXIMATE THE OTHER END OF SAID BODY TO COMMUNICATE A HOLLOW INJECTING NEEDLE THEREWITH, A RESILIENT PISTON PLUG SLIDABLY MOUNTED WITHIN THE TUBULAR BODY, SAID PLUG HAVING A DISTENDABLE CENTRAL PORTION AND A GENERALLY NON-DISTENDABLE SUPPORT THEREFOR, A COMPOUND ACTUATOR FOR SAID PISTON PLUG EXTENDING THROUGH THE OPENING IN SAID HEAD PORTION, SAID COMPOUND ACTUATOR INCLUDING A FIRST SLIDABLE STEM, A FINGER-ENGAGING HEAD AT ON END OF THE STEM AND A PLUG-ENGAGING HEAD AT THE OTHER END OF SAID FIRST STEM, A SECOND SLIDABLE STEM MOUNTED FOR LIMITED AXIAL MOVEMENT INDEPENDENTLY OF SAID FIRST STEM, A FINGER-ENGAGING HEAD AT ONE END OF SAID SECOND STEM, AND SAID OTHER END OF THE SECOND STEM ADAPTED TO ENGAGE AND DISTEND THE DISTENDABLE PORTION OF THE PISTON PLUG WHEN SAID FINGER-ENGAGING PORTION OF THE SECOND STEM IS DEPRESSED.
Claim 2
Dependent Claim
161 words
A HYPODERMIC SYRINGE COMPRISING A TUBULAR BODY MEMBER, A HEAD PORTION HAVING AN OPENING THEREIN AND DISPOSED PROXIMATE ONE END OF THE TUBULAR BODY, MEANS DISPOSED PORXIMATE THE OTHER END OF SAID BODY TO COMMUNICATE A HOLLOW INJECTING NEEDLE THEREWITH, A RESILIENT PISTON PLUG SLIDABLY MOUNTED WITHIN THE TUBULAR BODY, SAID PLUG HAVING A DISTENDABLE CENTRAL PORTION AND A GENERALLY NON-DISTENDABLE SUPPORT THEREFOR, A COMPOUND ACTUATOR FOR SAID PISTON PLUG EXTENDING THROUGH THE OPENING IN SAID HEAD PORTION, SAID COMPOUND ACTUATOR INCLUDING A FIRST SLIDABLE STEM, A FINGER-ENGAGING HEAD AT ON END OF THE STEM AND A PLUG-ENGAGING HEAD AT THE OTHER END OF SAID FIRST STEM, A SECOND SLIDABLE STEM MOUNTED FOR LIMITED AXIAL MOVEMENT INDEPENDENTLY OF SAID FIRST STEM, A FINGER-ENGAGING HEAD AT ONE END OF SAID SECOND STEM, AND SAID OTHER END OF THE SECOND STEM ADAPTED TO ENGAGE AND DISTEND THE DISTENDABLE PORTION OF THE PISTON PLUG WHEN SAID FINGER-ENGAGING PORTION OF THE SECOND STEM IS DEPRESSED.
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |