US3640890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithia silica glass laser containing various other alkali oxides
Assignee: Schott Optical Glass Inc
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Filing: 1969-06-06
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Granted: 1972-02-08
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Expires: 1989-06-06
Abstract
Abstract GLASS LASERS MADE FROM GLASSES CONTAINING THE FOLLOWING INGREDIENTS IN MOLE PERCENT: INGREDIENT: MOLE PERCENT SIO2 45 TO 75 AL2O3 0 TO 10 LI2O 18 TO 35 AND WHEREIN AT LEAST ONE ADDITIONAL ALKALI METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF NA2O, K2O, RB2O, CS2O AND MIXTURES IS PRESENT IN AN AMOUNT OF FROM 0.5 TO 10 MOLE PERCENT. ALKALINE EARTH OXIDES SUCH AS BEO, MGO, SRO, BAO, CAO AND MIXTURES THEREOF MAY ALSO BE PRESENT. NEODYMIUM OXIDE IS THE LASEABLE SUBSTANCE INCORPORATED INTO THE GLASSES. THE GLASS LASERS EXHIBIT IMPROVED EFFICIENCY AND HAVE LONGER DECAY TIMES AND ACCOMMODATE LARGER CONCENTRATIONS OF NEODYMIUM THAN WERE PRESENT HERETOFORE.
Inventors
- 👤 Haynes A Lee Jr
- 👤 Charles F Rapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:35
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/16; H01S3/17; C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/095; C03C4/00; C03C4/0071
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |