Patent US3663474A successfully refreshed from Google Patents.
US3663474A
Expired / Lapsed
US
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Erbium oxide/ytterbium oxide doped glass lasers
Assignee: Schott Optical Glass Inc
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Filing: 1970-04-14
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Granted: 1972-05-16
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Expires: 1990-04-14
Abstract
Abstract ERBIUM OXIDE/YTTERBIUM OXIDE GLASS LASER COMPOSITIONS USEFUL AS LASER RODS HAVING RELATIVELY HIGH EFFICIENCY AND LOW SOLARIZATION ARE PROVIDED, THE COMPOSITIONS CONTAINING ABOUT 45 TO 75 MOLE PERCENT SILICA, ABOUT 15 TO 35 PERCENT LITHIA, 0 TO 8 PERCENT ALUMINA AND 0 TO 30 PERCENT CACIA, WITH THE TOTAL OF LITHIA AND CALCIA BEING NOT SUBSTANTIALLY MORE THAN ABOUT 50%.
Inventors
- 👤 Haynes A Lee Jr
- 👤 Charles F Rapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:40
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/0071; C03C3/00; C03C3/04; C03C3/076; C03C3/095; H; H01; H01S; H01S3/00; H01S3/14; H01S3/16; H01S3/17
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |