Oxide glass showing long afterglow and accelerated phosphorescence
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Apr 16, 2002
Grant Date -
N/A
app pub date -
Nov 30, 1999
filing date -
Apr 1, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The object of the present invention is to provide an oxide glass capable of exhibiting a long lasting afterglow and photostimulated phosphorescence, whereby energy can be accumulated by radiation excitation, for example, by .gamma.-rays, X-rays, UV-rays, etc. and light emission can be continued for a long time even after stopping the excitation. That is, the present invention relates to an oxide glass capable of exhibiting a long lasting afterglow and photostimulated luminescence, characterized by a constitutional composition comprising, at least, terbium oxide (Tb.sub.2 O.sub.3) or manganese oxide (MnO), gallium oxide (Ga.sub.2 O.sub.3) or aluminum oxide (Al.sub.2 O.sub.3), alkali metal oxide or alkaline earth metal oxide and boron oxide (B.sub.2 O.sub.3) or silicon oxide (SiO.sub.2) or zinc oxide (ZnO).
First Claim
Other Claims data not available
Family
| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| JP | B2 | JP4421001 | Mar 26, 1999 |
| WO | A1 | WO1999050198 | Mar 30, 1999 |
| EP | A2 | EP1695946 | Mar 30, 1999 |
| EP | B1 | EP0992463 | Mar 30, 1999 |
International Classification(s)
- 1999 Application Filing Year
- C09K Class
- 622 Applications Filed
- 326 Patents Issued To-Date
- 52.42 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 5 Citation Count
- C09K Class
- 3.66 % this patent is cited more than
- 23 Age