Patent US3822338A successfully refreshed from Google Patents.
US3822338A
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Method of preparing massive monocrystalline yttriium titanate
Assignee: NL Chemicals Inc
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Filing: 1972-10-12
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Granted: 1974-07-02
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Expires: 1992-10-12
Abstract
Abstract A MASSIVE, BOULE-SHAPED SINGLE CRYSTAL OF YRTTRIUM TITANATE IS PREPARED BY FLAME FUSION OF A FINELY DIVIDED YTTRIUM TITANATE COMPOSITION THE BULK SIZE OF THE SINGLE CRYSTAL BOULE SO FORMED BEING SUCH AS TO PERMIT FABRICATION OF OPTICAL ELEMENTS SUCH AS LENSES AND PRISMS THEREFROM, AND/OR GEM STONES.
Inventors
- 👤 L Merker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:41
CPC Classifications
C; C30; C30B; C30B11/00; C30B11/04; C30B11/08; C30B11/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |