US3628523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Syringe
Assignee: Individual
•
Filing: 1968-12-05
•
Granted: 1971-12-21
•
Expires: 1988-12-05
Abstract
Abstract A syringe for the injection of radioactive medicinal and diagnostic compositions into the body, the syringe having a cylindrical body of lead glass with a hypodermic needle attached at one end thereof and at the other end, a plunger of stainless steel for slidable engagement with the inner surfaces of the wall of such cylindrical body, the plunger being coated at least along its surfaces adjacent the wall of the cylindrical body with a coating material which is a resilient polymeric material, rubber or combinations thereof.
Inventors
- 👤 Othel L Pirtle Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:08
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
109 words
A syringe comprising a cylindrical body having connected at one end thereof a hypodermic needle, such cylindrical body having a wall of lead glass having a density within the range of 2 to 6.5, said wall of said cylindrical body having a thickness of 2 to 5 millimeters, and a plunger for slidable engagement with the inner wall of said cylindrical body, said plunger being of stainless steel and having at least the portion of said plunger adapted for slidable engagement with the inner wall of said cylindrical body coated with a soft resilient material selected from the group consisting of resilient polymeric materials, rubber and combinations of these
Claim 2
Dependent Claim
109 words
A syringe comprising a cylindrical body having connected at one end thereof a hypodermic needle, such cylindrical body having a wall of lead glass having a density within the range of 2 to 6.5, said wall of said cylindrical body having a thickness of 2 to 5 millimeters, and a plunger for slidable engagement with the inner wall of said cylindrical body, said plunger being of stainless steel and having at least the portion of said plunger adapted for slidable engagement with the inner wall of said cylindrical body coated with a soft resilient material selected from the group consisting of resilient polymeric materials, rubber and combinations of these
Claim 3
Dependent Claim
37 words
The syringe of claim 1 wherein the inner end of said plunger is provided with a plunger tip comprising a soft resilient material selected from the group consisting of resilient polymeric materials, rubber and combinations of these.
Claim 4
Dependent Claim
20 words
The syringe of claim 1 wherein the density of said lead glass is within the range of 3.0 to 6.2.
Claim 5
Dependent Claim
17 words
The syringe of claim 1 wherein said thickness is within the range of 2.5 to 4 millimeters.
References Cited (Backward Citations)
US1753287A
Cited
US3150801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |