Patent US2511224A successfully refreshed from Google Patents.
US2511224A
Expired / Lapsed
US
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Fluoride glass
Assignee: Eastman Kodak Co
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Filing: 1944-12-15
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Granted: 1950-06-13
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Expires: 1964-12-15
Abstract
No abstract record available.
Inventors
- 👤 Sun Kuan-Han
- 👤 Maurice L Huggins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:50
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/23; C03C3/247; C03C3/32; C03C3/325; C03C3/326; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/902; Y10S501/906
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
A MOISTURE-INSUSCEPTIBLE, TRANSPARENT, COLORLESS FLUORIDE GLASS RESULTING FROM FUSION OF A BATCH CONSISTING OF COMPOUNDS COMPATIBLE IN A GLASS COMPOSITION AND CONTAINING THE FOLLOWING FLUORIDES IN THE PERCENTAGES BY WEIGHT GIVEN: MAGNESIUM 6 TO 13 PER CENT; CALCIUM 1.5 TO 27 PER CENT; STRONTIUM 1.5 TO 32 PER CENT; BARIUM 2 TO 39 PER CENT; LANTHANUM 2.5 TO 6 PER CENT; CERIUM 2 TO 5 PER CENT; THORIUM 4 TO 7 PER CENT; ALUMINUM 15 TO 25 PER CENT; BERYLLIUM 12 TO 25 PER CENT, THE SUM OF THE BERYLLIUM AND ALUMINUM FLUORIDES BEING BETWEEN 32 AND 50 PER CENT.
References Cited (Backward Citations)
US2038691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-12 | 1953-12-12 | 1954-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-12 | 1957-12-12 | 1958-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-12 | 1961-12-12 | 1962-06-13 | $7700.00 | Window Closed / Lapsed |