US3386799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Growth of yttrium iron garnet
Assignee: AT&T Inc
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Filing: 1965-11-16
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Granted: 1968-06-04
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Expires: 1985-11-16
Abstract
No abstract record available.
Inventors
- 👤 William H Grodkiewicz
- 👤 Le Grand G Van Uitert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:15
CPC Classifications
C; C30; C30B; C30B9/00; C30B9/04; C30B9/08; C30B9/12; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C30B29/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A METHOD FOR GROWING CRYSTALS OF Y3FE5O12 OF SUBSTANTIAL SIZE, WHICH COMPRISES ESTABLISHING A MELT OF A NUTRIENT, COMPRISING THE CONSTITUENT COMPONENTS OF SAID CRYSTALS AND CONTAINING CAO IN AN AMOUNT RANGING FROM 0.05 TO 5 PERCENT BY WEIGHT OF SAID COMPONENTS TOGETHER WITH A FLUX SELECTED FROM THE GROUP CONSISTING OF (A) LEAD FLUORIDE AND BORON OXIDE AND (B) LEAD FLUORIDE, BORON OXIDE AND LEAD OXIDE AND COOLING THE RESULTING MELT UNTIL CRYSTALS OF Y3FE5O12 ARE FOUND, THE WEIGHT RATIO OF LEAD OXIDE TO LEAD FLUORIDE IN THE FLUX RANGING FROM 0 TO 1.5:1, THE AMOUNT OF BORON OXIDE IN SAID FLUX BEING SUCH THAT THE WEIGHT RATIO OF B2O3/PBO+PBF2 RANGES FROM 1:20 TO 1:200, THE NUTRIENT TO FLUX WEIGHT RATIO RANGES FROM 1:2 TO 1:2.5, AND SAID COOLING IS CONDUCTED AT A RATE OF ABOUT 1/2*C. TO 10*C. PER HOUR.
Claim 2
Independent Claim
142 words
A METHOD FOR GROWING CRYSTALS OF Y3FE5O12 OF SUBSTANTIAL SIZE, WHICH COMPRISES ESTABLISHING A MELT OF A NUTRIENT, COMPRISING THE CONSTITUENT COMPONENTS OF SAID CRYSTALS AND CONTAINING CAO IN AN AMOUNT RANGING FROM 0.05 TO 5 PERCENT BY WEIGHT OF SAID COMPONENTS TOGETHER WITH A FLUX SELECTED FROM THE GROUP CONSISTING OF (A) LEAD FLUORIDE AND BORON OXIDE AND (B) LEAD FLUORIDE, BORON OXIDE AND LEAD OXIDE AND COOLING THE RESULTING MELT UNTIL CRYSTALS OF Y3FE5O12 ARE FOUND, THE WEIGHT RATIO OF LEAD OXIDE TO LEAD FLUORIDE IN THE FLUX RANGING FROM 0 TO 1.5:1, THE AMOUNT OF BORON OXIDE IN SAID FLUX BEING SUCH THAT THE WEIGHT RATIO OF B2O3/PBO+PBF2 RANGES FROM 1:20 TO 1:200, THE NUTRIENT TO FLUX WEIGHT RATIO RANGES FROM 1:2 TO 1:2.5, AND SAID COOLING IS CONDUCTED AT A RATE OF ABOUT 1/2*C. TO 10*C. PER HOUR.
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) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |