Patent US3725718A successfully refreshed from Google Patents.
US3725718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-sprayed ferrite powder x-ray radiation shield
Assignee: Stackpole Carbon Co
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Filing: 1969-04-29
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Granted: 1973-04-03
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Expires: 1989-04-29
Abstract
Abstract Ferrite powder is flame sprayed onto a glass or ceramic substrate to form a continuous coating, in which the powder is fused together and to the substrate to form a radiation shield. When the substrate is the glass envelope of a television receiver high voltage rectifier tube, such a shield in the correct location will absorb most of the X-rays that otherwise would be emitted by the tube.
Inventors
- 👤 V Quirk
- 👤 J Titlar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:05
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
18 words
A radiation shield according to claim 1, in which said coating is between 0.004 and 0.014 inch thick.
References Cited (Backward Citations)
US2291406A
Cited
US2820720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |