US2852890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic unicrystalline bodies and methods for making same
Assignee: Union Carbide Corp
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Filing: 1955-08-12
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Granted: 1958-09-23
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Expires: 1975-08-12
Abstract
No abstract record available.
Inventors
- 👤 Drost Wilfred
- 👤 Richard W Kebler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:34
CPC Classifications
C; C30; C30B; C30B11/00; C30B11/04; C30B11/08; C30B11/10; Y; Y10; Y10S; Y10S117/00; Y10S117/901; Y10S117/902; Y10S117/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A PROCESS FOR GROWING A SYNTHETIC UNICRYSTALLINE BODY WHICH COMPRISES PASSING POWDERED CONSTITUENT MATERIAL THROUGH A FLAME TO FUSE THE SAME; DIRECTING SAID FLAME TOWARD A SEED CRYSTAL DISPOSED ON AN AXIS SUBSTANTIALLY NORMAL TO THE FLAME FOR DEPOSITING FUSED MATERIAL AND BUILDING UP SUCH MATERIAL BY CRYSTALLIZATION ON SAID SEED CRYSTAL; ROTATING SAID SEED CRYSTAL ABOUT SAID AXIS AT A RATE FAST ENOUGH TO BRING EACH POINT ON THE OUTER EDGE OF THE CRYSTAL BACK UNDER THE FLAME WHILE IT IS STILL MOLTEN, SO AS TO GROW A RADIALLY OUTWARDLY ENLARGING CRYSTAL OF INCREASING DIAMETER; AND VARYING THE DISTANCE BETWEEN THE
Claim 2
Dependent Claim
102 words
A PROCESS FOR GROWING A SYNTHETIC UNICRYSTALLINE BODY WHICH COMPRISES PASSING POWDERED CONSTITUENT MATERIAL THROUGH A FLAME TO FUSE THE SAME; DIRECTING SAID FLAME TOWARD A SEED CRYSTAL DISPOSED ON AN AXIS SUBSTANTIALLY NORMAL TO THE FLAME FOR DEPOSITING FUSED MATERIAL AND BUILDING UP SUCH MATERIAL BY CRYSTALLIZATION ON SAID SEED CRYSTAL; ROTATING SAID SEED CRYSTAL ABOUT SAID AXIS AT A RATE FAST ENOUGH TO BRING EACH POINT ON THE OUTER EDGE OF THE CRYSTAL BACK UNDER THE FLAME WHILE IT IS STILL MOLTEN, SO AS TO GROW A RADIALLY OUTWARDLY ENLARGING CRYSTAL OF INCREASING DIAMETER; AND VARYING THE DISTANCE BETWEEN THE
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) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |