US4079258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminescent screen excitable with energy-rich radiation
Assignee: Siemens AG
•
Filing: 1976-02-04
•
Granted: 1978-03-14
•
Expires: 1996-02-04
Abstract
Abstract A luminescent screen which is applicable to X-ray diagnosis, and also with particular advantage to the soft-radiation technology. For the producing of this fluorescent material, a corresponding quantity of rubidium bromide and thallium halogenide may be mixed under the addition of water, and thereafter dried through the introduction of heat.
Inventors
- 👤 Karl Franz
- 👤 Margot Stachowiak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:20
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/38; H01J29/385; C; C09; C09K; C09K11/00; C09K11/08; C09K11/62; C09K11/626; C09K11/628; G; G21; G21K; G21K4/00; H01J9/00; H01J9/02; H01J9/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
44 words
A radiation converter screen for X-rays having an energy level of 10 to 30 keV comprising: a carrier member substantially transmissive to said X-rays and a fluorescent layer on a surface of said carrier member, said fluorescent layer consisting essentially of activated rubidium bromide.
Claim 2
Dependent Claim
44 words
A radiation converter screen for X-rays having an energy level of 10 to 30 keV comprising: a carrier member substantially transmissive to said X-rays and a fluorescent layer on a surface of said carrier member, said fluorescent layer consisting essentially of activated rubidium bromide.
Claim 3
Dependent Claim
29 words
A radiation converter screen as defined in claim 1 wherein said activated rubidium bromide has the formula: RbBr:Tl.sub.y Br wherein y is a numeral ranging from 0.1 to 2.
Claim 4
Dependent Claim
34 words
An X-ray converter screen comprised of a carrier member substantially transmissive to X-ray radiation and a fluorescent layer on a surface of said carrier member, said fluorescent layer consisting essentially of activated rubidium bromide.
Claim 5
Dependent Claim
34 words
An X-ray converter screen comprised of a carrier member substantially transmissive to X-ray radiation and a fluorescent layer on a surface of said carrier member, said fluorescent layer consisting essentially of activated rubidium bromide.
Claim 6
Dependent Claim
35 words
An X-ray converter screen as defined in claim 3 wherein said activated rubidium bromide is activated with a thallium halogenide, said thallium halogenide comprising about 0.1 to 2% by weight of said activated rubidium bromide.
Claim 7
Dependent Claim
23 words
An X-ray converter screen as defined in claim 4 wherein said halogenide is selected from the group consisting of bromine, chlorine and iodine.
Claim 8
Dependent Claim
13 words
An X-ray image intensifier including a converter screen as defined in claim 3.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |