Patent US2992903A successfully refreshed from Google Patents.
US2992903A
Expired / Lapsed
US
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Apparatus for growing thin crystals
Assignee: Individual
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Filing: 1957-10-30
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Granted: 1961-07-18
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Expires: 1977-10-30
Abstract
No abstract record available.
Inventors
- 👤 Imber Oscar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:14
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/16; C30B13/18; C30B29/00; C30B29/60; Y; Y10; Y10S; Y10S148/00; Y10S148/071; Y10S148/074; Y10S148/107; Y10S148/15; Y10S148/152; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1076; Y10T117/108; Y10T117/1088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
AN APPARATUS FOR GROWING A THIN CRYSTAL WHICH COMPRISES A SUBSTRATE HAVING ESSENTIALLY A FLAT PLANAR SURFACE WHICH IS ADAPTED TO SUPPORT A SEED CRYSTAL AND A POWDER LAYER OF A SELECTED MATERIAL, A HEAT-TRANSFER SHEET HAVING A NARROW EDGE, SAID SHEET BEING POSITIONED OVER SAID SUBSTRATE WITH SAID NARROW EDGE ARRANGED IN CLOSE PROXIMITY AND EQUIDISTANT TO SAID PLANAR SURFACE AND MEANS FOR PROGRESSIVELY MOVING SAID SUBSTRATE PARALLEL TO SAID PLANAR SURFACE WHEREBY A RELATIVELY NARROW PORTION OF POWDER ADJACENT TO SAID CRYSTAL IS MAINTAINED AS A MELT, WHICH CRYSTALLIZES PROGRESSIVELY ALONG THE LENGTH OF SAID SUBSTRATE.
Claim 2
Independent Claim
98 words
AN APPARATUS FOR GROWING A THIN CRYSTAL WHICH COMPRISES A SUBSTRATE HAVING ESSENTIALLY A FLAT PLANAR SURFACE WHICH IS ADAPTED TO SUPPORT A SEED CRYSTAL AND A POWDER LAYER OF A SELECTED MATERIAL, A HEAT-TRANSFER SHEET HAVING A NARROW EDGE, SAID SHEET BEING POSITIONED OVER SAID SUBSTRATE WITH SAID NARROW EDGE ARRANGED IN CLOSE PROXIMITY AND EQUIDISTANT TO SAID PLANAR SURFACE AND MEANS FOR PROGRESSIVELY MOVING SAID SUBSTRATE PARALLEL TO SAID PLANAR SURFACE WHEREBY A RELATIVELY NARROW PORTION OF POWDER ADJACENT TO SAID CRYSTAL IS MAINTAINED AS A MELT, WHICH CRYSTALLIZES PROGRESSIVELY ALONG THE LENGTH OF SAID SUBSTRATE.
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) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |