US4587277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation shield
Assignee: YUKIYASU UNNO KAMIYOGA
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Filing: 1983-11-21
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Granted: 1986-05-06
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Expires: 2003-11-21
Abstract
Abstract A radiation shield superior to lead in absorbing/attenuating X-rays and the like made by molding with a resin binder a mixture of powders, namely lead oxide derived from scrap storage batteries, slag derived from electrorefining of aluminum, nickel or chromium as a by-product, and molybdenite. The molded shield may also contain zeolite for gas absorption and a reinforcing core of glass fabric.
Inventors
- 👤 Shinobu Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:20
CPC Classifications
G; G21; G21F; G21F1/00; G21F1/02; G21F1/08; G21F1/085; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; G21F1/10; G21F1/103; G21F1/106; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2926; Y10T442/2992
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
59 words
A molded radiation shield comprising a thermosetting resin-bonded mixture of powders having the following composition 30 to 60% lead oxide, 10 to 30% slag derived from the electro-refining of aluminum, 5to 15% of molybdenite, said percentages being by weight based upon the total weight of the composition, and sufficient resin to bind the powders together to form said shield.
Claim 2
Dependent Claim
59 words
A molded radiation shield comprising a thermosetting resin-bonded mixture of powders having the following composition 30 to 60% lead oxide, 10 to 30% slag derived from the electro-refining of aluminum, 5to 15% of molybdenite, said percentages being by weight based upon the total weight of the composition, and sufficient resin to bind the powders together to form said shield.
Claim 3
Dependent Claim
17 words
The shield of claim 1 in which said shield has a reinforcing core of inorganic textile material.
Claim 4
Dependent Claim
14 words
The shield of claim 2 in which said inorganic textile material is alkali glass.
Claim 5
Dependent Claim
19 words
The shield of claim 1 which also includes from 10 to 30% zeolite as part of the powder mixture.
Claim 6
Dependent Claim
49 words
The shield of claim 1 in which said lead oxide is present in quantity of about 50%, said aluminum slag is present in a quantity of about 23%, and said molybdenite is present in quantity of about 10%, and said resin is present in a quantity of about 5%.
Claim 7
Dependent Claim
35 words
The shield of claim 1 wherein said lead oxide and said molybdenite powders have a particular size of 300 to 900 mesh, and said slag powder has a particulate size of 30 to 70 mesh.
Claim 8
Dependent Claim
16 words
The shield of claim 1 wherein the resin binder is a melamine or epoxy thermosetting resin.
Claim 9
Dependent Claim
16 words
The shield of claim 1 in which said lead oxide powder is waste from storage batteries.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |