US3974322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radioactive source
Assignee: Individual
•
Filing: 1973-12-17
•
Granted: 1976-08-10
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Expires: 1993-12-17
Abstract
Abstract A radioactive layer in a radioactive source is sealed by the application of a sealing layer on the radioactive layer. The sealing layer can consist of a film of oxide of titanium, tin, zirconium, aluminum, or chromium. Preferably, the sealing layer is pure titanium dioxide. The radioactive layer is embedded in a finish enamel which, in turn, is on a priming enamel which surrounds a substrate.
Inventors
- 👤 Lidia Emelianovna Drabkina
- 👤 Jury Vatslavovich Mazurek
- 👤 Dmitry Nikolaevich Myascedov
- 👤 Viktor Pavlovich Prokhorov
- 👤 Vladimir Alexandrovich Kachalov
- 👤 David Moiscevich Ziv, deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:55
CPC Classifications
H; H05; H05F; H05F3/00; H05F3/06; Y; Y10; Y10S; Y10S428/00; Y10S428/922
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
41 words
In a radioactive source having a radioactive layer applied on a substrate, the improvement comprising a sealing layer coating said radioactive layer, and an enamel layer interposed between the substrate and the radioactive layer, said sealing layer being pure titanium dioxide.
Claim 2
Dependent Claim
41 words
In a radioactive source having a radioactive layer applied on a substrate, the improvement comprising a sealing layer coating said radioactive layer, and an enamel layer interposed between the substrate and the radioactive layer, said sealing layer being pure titanium dioxide.
Claim 3
Dependent Claim
65 words
A radioactive source comprising a substrate, a priming enamel on said substrate, a finish enamel on said priming enamel, a radioactive material embeded in said finish enamel and forming a radioactive layer and a sealing layer coating said radioactive layer, said sealing layer consisting of a film of an oxide of one metal selected from the group consisting of titanium, tin, zirconium, aluminum and chromium.
Claim 4
Dependent Claim
65 words
A radioactive source comprising a substrate, a priming enamel on said substrate, a finish enamel on said priming enamel, a radioactive material embeded in said finish enamel and forming a radioactive layer and a sealing layer coating said radioactive layer, said sealing layer consisting of a film of an oxide of one metal selected from the group consisting of titanium, tin, zirconium, aluminum and chromium.
Claim 5
Dependent Claim
26 words
A radioactive source as claimed in claim 2 wherein said oxide film is substantially pure and obtained by vapor phase hydrolysis of the respective metal chloride.
References Cited (Backward Citations)
US2894846A
Cited
US3438803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |