US3740241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver activated phosphate glass batched with nitrite
Assignee: LEITZ E DT
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Filing: 1970-12-28
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Granted: 1973-06-19
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Expires: 1990-12-28
Abstract
Abstract A SILVER-ACTIVATED PHOSPHATE GLASS IS DISCLOSED FOR USE AS A DOSIMETER GLASS HVING IMPROVED WEATHERING RESISTANCE. THE GLASS IS MELTED FROM A BATCH COMPOSITION CONSISTING ESSENTIALLY OF: 35.4-46.6 PERCENT BY WEIGHT OF LITHIUM METAPHOSPHATE, 28.4-44.6 PERCENT BY WEIGHT OF ALUMINUM METAPHOSPHATE, 2-8 PERCENT BY WEIGHT OF SILVER METAPHOSPHATE, 7-20 PERCENT BY WEIGHT OF BERYLLIUM OXIDE, AND 0.1-2 PERCENT BY WEIGHT OF SODIUM NITRITE WHEREIN THE SUMMATION OF LITHIUM METAPHOSPHATE, ALUMINUM METAPHOSPHATE AND SILVER METAPHOSPHATE IS 78.088.0 PERCENT BY WEIGHT.
Inventors
- 👤 H Broemer
- 👤 N Meinert
- 👤 H Preuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:17
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/16; C03C3/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |