US3454899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Europium doped yttrium oxide optical maser materials
Assignee: Verizon Laboratories Inc
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Filing: 1962-11-16
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Granted: 1969-07-08
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Expires: 1982-11-16
Abstract
No abstract record available.
Inventors
- 👤 Robert A Lefever
- 👤 Nien-Chih Chang
- 👤 Robert L White
- 👤 Kenneth A Wickersheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:19
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
AN ACTIVE MEDIUM FOR AN OPTICAL MASER WHICH COMPRISES A SINGLE CRYSTAL ROD HAVING OPTICALLY POLISHED ENDS, SAID ENDS HAVING A LIGHT REFLECTING FILM THEREON, SAID ROD CONSISTING ESSENTIALLY OF A YTTRIUM OXIDE HOST MATERIAL HAVING THE CUBIC C-TYPE RARE EARTH OXIDE STRUCTURE SAID OXIDE CONTAINING FROM 0.001 MOLE PERCENT TO ABOUT 20 MOLE PERCENT OF AT LEAST ONE RARE EARTH DOPING ION SELECTED FROM THE GROUP CONSISTING OF EUROPIUM, TERBIUM, ERBIUM, NEODYMIUM, CERIUM AND GADOLINIUM.
Claim 2
Dependent Claim
76 words
AN ACTIVE MEDIUM FOR AN OPTICAL MASER WHICH COMPRISES A SINGLE CRYSTAL ROD HAVING OPTICALLY POLISHED ENDS, SAID ENDS HAVING A LIGHT REFLECTING FILM THEREON, SAID ROD CONSISTING ESSENTIALLY OF A YTTRIUM OXIDE HOST MATERIAL HAVING THE CUBIC C-TYPE RARE EARTH OXIDE STRUCTURE SAID OXIDE CONTAINING FROM 0.001 MOLE PERCENT TO ABOUT 20 MOLE PERCENT OF AT LEAST ONE RARE EARTH DOPING ION SELECTED FROM THE GROUP CONSISTING OF EUROPIUM, TERBIUM, ERBIUM, NEODYMIUM, CERIUM AND GADOLINIUM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |