US2988433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming crystals
Assignee: International Business Machines Corp
•
Filing: 1957-12-31
•
Granted: 1961-06-13
•
Expires: 1977-12-31
Abstract
No abstract record available.
Inventors
- 👤 James S Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:58
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
THE METHOD OF GROWING A MONOCRYSTALLINE INGOT HAVING FACETS COINCIDING WITH CRYSTALLOGRAPHIC PLANES OF THE MATERIAL OF SAID INGOT, SO AS TO ENABLE THE GROWN INGOT TO BE ORIENTED WITH RESPECT TO ITS CRYSTALLOGRAPHIC PLANES BY OPTICAL METHODS, COMPRISING THE STEPS OF INSERTING A SEED CRYSTAL OF THE SAME MATERIAL AS SAID INGOT IN A MOLTEN MASS OF SAID MATERIAL, SLOWLY WITHDRAWING THE SEED CRYSTAL FROM THE MOLTEN MASS WHILE MAINTAINING THE MOLTEN MASS AT A TEMPERATURE SLIGHTLY ABOVE THE MELTING POINT OF THE MATERIAL, THEREBY GROWING A CRYSTAL ON THE SEED CRYSTAL, CONTINUING THE SLOW WITHDRAWING MOVEMENT OF THE SEED CRYSTAL UNTIL THE GROWN CRYSTAL REACHES A DESIRED LENGTH, INCREASING THE RADIAL RATE OF CRYSTAL FORMATION WITH RESPECT TO THE RATE OF SUCH SLOW MOVEMENT, SO AS TO PRODUCE AN OUTWARD FLARE ON THE CRYSTAL, AND THEN IMMEDIATELY AND SUDDENLY WITHDRAWING THE CRYSTAL FROM THE MOLTEN MASS.
Claim 2
Independent Claim
148 words
THE METHOD OF GROWING A MONOCRYSTALLINE INGOT HAVING FACETS COINCIDING WITH CRYSTALLOGRAPHIC PLANES OF THE MATERIAL OF SAID INGOT, SO AS TO ENABLE THE GROWN INGOT TO BE ORIENTED WITH RESPECT TO ITS CRYSTALLOGRAPHIC PLANES BY OPTICAL METHODS, COMPRISING THE STEPS OF INSERTING A SEED CRYSTAL OF THE SAME MATERIAL AS SAID INGOT IN A MOLTEN MASS OF SAID MATERIAL, SLOWLY WITHDRAWING THE SEED CRYSTAL FROM THE MOLTEN MASS WHILE MAINTAINING THE MOLTEN MASS AT A TEMPERATURE SLIGHTLY ABOVE THE MELTING POINT OF THE MATERIAL, THEREBY GROWING A CRYSTAL ON THE SEED CRYSTAL, CONTINUING THE SLOW WITHDRAWING MOVEMENT OF THE SEED CRYSTAL UNTIL THE GROWN CRYSTAL REACHES A DESIRED LENGTH, INCREASING THE RADIAL RATE OF CRYSTAL FORMATION WITH RESPECT TO THE RATE OF SUCH SLOW MOVEMENT, SO AS TO PRODUCE AN OUTWARD FLARE ON THE CRYSTAL, AND THEN IMMEDIATELY AND SUDDENLY WITHDRAWING THE CRYSTAL FROM THE MOLTEN MASS.
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) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |