US3619219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nuclear radiation absorbing glass
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1968-08-27
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Granted: 1971-11-09
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Expires: 1988-08-27
Abstract
Abstract In a glass composition containing boric acid as the glass former and further containing the oxides of beryllium and lithium for the purpose of slowing down and moderating nuclear radiation a certain percentage of tungsten oxide is introduced to the effect that the percentage of lithium oxide can then be increased to an amount which in pure L:20/BeO/B2O=3-glasses has previously only been achieved with miniature melts of approximately 0.5 grams.
Inventors
- 👤 Heinz Bromer
- 👤 Norbert Meinert
- 👤 Hans-Jorgen Preuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:24
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/08; C03C3/00; C03C3/12; C03C3/14; C03C3/145
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
25 words
A nuclear radiation absorbing glass composition according to claim 1, and further containing up to about 2.6 percent by weight of the oxide of samarium.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |