US3177154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical maser crystals
Assignee: AT&T Inc
•
Filing: 1961-08-07
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Granted: 1965-04-06
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Expires: 1981-08-07
Abstract
No abstract record available.
Inventors
- 👤 Ralph R Soden
- 👤 Le Grand G Van Uitert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:24
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7766; C09K11/7776; H; H01; H01S; H01S3/00; H01S3/14; H01S3/16; H01S3/1688
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF A SINGLE CRYSTAL TUNGSTATE MATERIAL HAVING A CRYSTALLINE LATTICE OF THE SCHEELITE STRUCTURE AND AN EMPIRICAL FORMULA LI0.5A0.5-XBXWO4, WHERE A IS AN ION SELECTED FROM THE GROUP CONSISTIG OF YTTRIUM, LANTHANUM, AND GADOLINIUM, B IS A TRIVALENT RARE-EARTH ION SELECTED FROM THE GROUP CONSISTING OF EUROPIUM, TERBIUM, AND YTTERBIUM, AND X HAS A VALUE OF FROM 0.07 TO 0.05.
Claim 2
Dependent Claim
66 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF A SINGLE CRYSTAL TUNGSTATE MATERIAL HAVING A CRYSTALLINE LATTICE OF THE SCHEELITE STRUCTURE AND AN EMPIRICAL FORMULA LI0.5A0.5-XBXWO4, WHERE A IS AN ION SELECTED FROM THE GROUP CONSISTIG OF YTTRIUM, LANTHANUM, AND GADOLINIUM, B IS A TRIVALENT RARE-EARTH ION SELECTED FROM THE GROUP CONSISTING OF EUROPIUM, TERBIUM, AND YTTERBIUM, AND X HAS A VALUE OF FROM 0.07 TO 0.05.
References Cited (Backward Citations)
US2929922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |