US2753280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for growing crystalline material
Assignee: RCA Corp
•
Filing: 1952-05-01
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Granted: 1956-07-03
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Expires: 1972-05-01
Abstract
No abstract record available.
Inventors
- 👤 Arnold R Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:42
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/10; C30B15/12; Y; Y10; Y10S; Y10S117/00; Y10S117/90; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1032; Y10T117/1052
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A METHOD OF PRODUCING CRYSTALLINE MATERIAL HAVING ZONES OF DIFFERENT COMPOSITION COMPRISING WITHDRAWING AT A PREDETERMINED RATE OF SPACED A SEED CRYSTAL FROM A VESSEL CONTAINING A MOLTEN MATERIAL HAVING A CERTAIN IMPURITY CONTENT SO AS TO GROW A CRYSTAL PORTION OF SAID MATERIAL ATTACHED TO SAID SEED CRYSTAL, AND, AFTER SAID GROWING CRYSTAL PORTION HAS ATTAINED A DESIRED LENGTH, TRANSFERRING SAID GROWING CRYSTAL PORTION TO ANOTHER VESSEL CONTAINING SAID MATERIAL HAVING A DIFFERENT IMPURITY CONTENT, SAID TRANSFER BEING EFFECTED WITHOUT BREAKING CONTACT BETWEEN THE GROWING CRYSTAL PORTION AND THE MOLTEN MATERIAL, AND CONTINUING THE GROWTH OF SAID GROWING CRYSTAL PORTION.
Claim 2
Independent Claim
101 words
A METHOD OF PRODUCING CRYSTALLINE MATERIAL HAVING ZONES OF DIFFERENT COMPOSITION COMPRISING WITHDRAWING AT A PREDETERMINED RATE OF SPACED A SEED CRYSTAL FROM A VESSEL CONTAINING A MOLTEN MATERIAL HAVING A CERTAIN IMPURITY CONTENT SO AS TO GROW A CRYSTAL PORTION OF SAID MATERIAL ATTACHED TO SAID SEED CRYSTAL, AND, AFTER SAID GROWING CRYSTAL PORTION HAS ATTAINED A DESIRED LENGTH, TRANSFERRING SAID GROWING CRYSTAL PORTION TO ANOTHER VESSEL CONTAINING SAID MATERIAL HAVING A DIFFERENT IMPURITY CONTENT, SAID TRANSFER BEING EFFECTED WITHOUT BREAKING CONTACT BETWEEN THE GROWING CRYSTAL PORTION AND THE MOLTEN MATERIAL, AND CONTINUING THE GROWTH OF SAID GROWING CRYSTAL PORTION.
References Cited (Backward Citations)
US2449484A
Cited
US2623105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-03 | 1960-01-02 | 1960-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-03 | 1964-01-02 | 1964-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-03 | 1968-01-02 | 1968-07-03 | $7700.00 | Window Closed / Lapsed |