US4081689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radioactive shielding material
Assignee: Atomic Products Corp
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Filing: 1976-09-17
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Granted: 1978-03-28
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Expires: 1996-09-17
Abstract
Abstract A radioactive shielding material formed by coating or plating depleted uranium U-238 with a layer of beta ray impermeable material. The material has particular application for use as a hypodermic syringe shield component, and as shields for other hand held instruments carrying or impregnated with radioactive materials.
Inventors
- 👤 Meyer M. Reiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:41
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/1785; G; G21; G21F; G21F5/00; G21F5/015; G21F5/018; G21F9/00; G21F9/001
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
57 words
A radiation shield for use in enclosing radioactive hand operated instrumentation consisting of a main body of shield material formed from depleted uranium 238, and a layer of material deposited upon an exposed surface of said main body, said layer being at least partially impervious to the passage of residual beta ray defusion from said main body.
Claim 2
Dependent Claim
57 words
A radiation shield for use in enclosing radioactive hand operated instrumentation consisting of a main body of shield material formed from depleted uranium 238, and a layer of material deposited upon an exposed surface of said main body, said layer being at least partially impervious to the passage of residual beta ray defusion from said main body.
Claim 3
Dependent Claim
26 words
A shield in accordance with claim 1, in which said layer is selected from the group of metals consisting of tungsten, tantalum, brass, steel and aluminum.
Claim 4
Dependent Claim
33 words
A shield in accordance with claim 1, in which two layers are deposited on the exposed surfaces of said main body, including a first layer of brass and a second layer of tungsten.
References Cited (Backward Citations)
US3973554A
Cited
US3993063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-27 | 1981-09-26 | 1982-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-27 | 1985-09-26 | 1986-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-27 | 1989-09-26 | 1990-03-28 | $7700.00 | Window Closed / Lapsed |