US3063886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boron oxide-lead oxide etchant and etching process
Assignee: AT&T Inc
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Filing: 1960-06-02
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Granted: 1962-11-13
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Expires: 1980-06-02
Abstract
No abstract record available.
Inventors
- 👤 Joseph P Remeika
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:22
CPC Classifications
C; C30; C30B; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2675; C04B41/00; C04B41/53; C04B41/5338; C04B41/5361; C30B9/00; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/34; H01F1/342; H01F1/344; H01F41/00; H01F41/14; H01F41/24; H01F41/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
THE METHOD OF ETCHING SINGLE CRYSTALS OF A MATERIAL CONSISTING ESSENTIALLY OF AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF SYNTHETIC GARNETS, FERRITES, CORUNDUM AND ORTHOFERRITES WHICH COMPRISES HEATING SAID MATERIAL TOGETHER WITH A MIXTURE OF LEAD OXIDE AND BORON OXIDE TO A TEMPERATURE IN THE RANGE OF 500-800*C., THEREBY FORMING A MELT, COOLING THE SAID MELT UNTIL THE SAID MIXTURE SOLIDIFIES WITH THE CRYSTAL IMBEDDED THEREIN AND DISSOLVING THE SOLIDIFIED MIXTURE.
Claim 2
Independent Claim
74 words
THE METHOD OF ETCHING SINGLE CRYSTALS OF A MATERIAL CONSISTING ESSENTIALLY OF AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF SYNTHETIC GARNETS, FERRITES, CORUNDUM AND ORTHOFERRITES WHICH COMPRISES HEATING SAID MATERIAL TOGETHER WITH A MIXTURE OF LEAD OXIDE AND BORON OXIDE TO A TEMPERATURE IN THE RANGE OF 500-800*C., THEREBY FORMING A MELT, COOLING THE SAID MELT UNTIL THE SAID MIXTURE SOLIDIFIES WITH THE CRYSTAL IMBEDDED THEREIN AND DISSOLVING THE SOLIDIFIED MIXTURE.
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) | 1965-11-12 | 1966-05-14 | 1966-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-12 | 1970-05-14 | 1970-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-12 | 1974-05-14 | 1974-11-13 | $7700.00 | Window Closed / Lapsed |