US3257327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for growing neodymium doped single crystal divalent metal ion tungstates
Assignee: AT&T Inc
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Filing: 1962-05-07
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Granted: 1966-06-21
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Expires: 1982-05-07
Abstract
No abstract record available.
Inventors
- 👤 Nassau Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:38
CPC Classifications
C; C30; C30B; C30B15/00; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7708; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C30B29/32; H; H01; H01S; H01S3/00; H01S3/14; H01S3/16; H01S3/1601; H01S3/1603; H01S3/1611; H01S3/163; H01S3/1675; Y; Y10; Y10S; Y10S117/00; Y10S117/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A PROCESS FOR GROWING SINGLE CRYSTALS OF CALCIUM TUNGSTATE COMPRISING FORMING A MIXTUE OF INITIAL INGREDIENTS EQUIVALENT TO CAWO4 TOGETHER WITH A TRIVALENT NEODYMIUM ION-CONTAINING SUBSTANCE CONTAINING FROM ABOUT 0.01 ATOM PERCENT TO 18 ATOM PERCENT BASED ON THE TOTAL CALCIUM IONS PRESENT OF NEODYMIUM ION AND A MONOVALENT SODIUM ION-CONTAINING SUBSTANCE CONTAINING FROM ABOUT 1.5 SODIUM IONS TO 15 SODIUM IONS PER NEODYMIUM ION PRESENT, UP TO A MIXIMUM OF 30 ATOM PERCENT BASED ON THE TOTAL CALCIUM IONS PRESENT, HEATING SAID INITIAL INGREDIENTS TO A TEMPERATURE SUFFICIENT TO FORM A MOLTEN SOLUTION, INSERTING A SEED CRYSTAL INTO SAID MOLTEN SOLUTION AND SLOWLY WITHDRAWING SAID SEED CRYSTAL FROM SAID SOLUTION, THEREBY PROMOTING CRYSTAL GROWTH ON SAID SEED CRYSTAL.
Claim 2
Dependent Claim
119 words
A PROCESS FOR GROWING SINGLE CRYSTALS OF CALCIUM TUNGSTATE COMPRISING FORMING A MIXTUE OF INITIAL INGREDIENTS EQUIVALENT TO CAWO4 TOGETHER WITH A TRIVALENT NEODYMIUM ION-CONTAINING SUBSTANCE CONTAINING FROM ABOUT 0.01 ATOM PERCENT TO 18 ATOM PERCENT BASED ON THE TOTAL CALCIUM IONS PRESENT OF NEODYMIUM ION AND A MONOVALENT SODIUM ION-CONTAINING SUBSTANCE CONTAINING FROM ABOUT 1.5 SODIUM IONS TO 15 SODIUM IONS PER NEODYMIUM ION PRESENT, UP TO A MIXIMUM OF 30 ATOM PERCENT BASED ON THE TOTAL CALCIUM IONS PRESENT, HEATING SAID INITIAL INGREDIENTS TO A TEMPERATURE SUFFICIENT TO FORM A MOLTEN SOLUTION, INSERTING A SEED CRYSTAL INTO SAID MOLTEN SOLUTION AND SLOWLY WITHDRAWING SAID SEED CRYSTAL FROM SAID SOLUTION, THEREBY PROMOTING CRYSTAL GROWTH ON SAID SEED CRYSTAL.
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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |