US2839436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for growing semiconductor crystals
Assignee: Texas Instruments Inc
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Filing: 1955-04-19
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Granted: 1958-06-17
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Expires: 1975-04-19
Abstract
No abstract record available.
Inventors
- 👤 Cornelison Boyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:40
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/14; C30B15/20; C30B15/22; C30B15/24; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1032; Y10T117/1068
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A METHOD OF GROWING CRYSTALS FROM A MELT THAT COMPRISES MAINTAINING THE MELT AT A TEMPERATURE AT WHICH A CRYSTAL WILL GROW THEREFROM, BRINGING A SEED CRYSTAL INTO CONTACT WITH THE SURFACE OF THE MELT AND WITHDRAWING IT AT A RATE SUCH AS WILL DRAW A CRYSTAL THEREON, AND APPLYING SUPPLEMENTAL HEAT TO A CENTRAL PORTION AT THE BOTTOM OF SAID MELT TO PRODUCE A SUBSTANTIALLY PLANAR INTERFACE BETWEEN SAID CRYSTAL AND SAID MELT DURING THE CRYSTAL GROWING PROCESS.
Claim 2
Independent Claim
79 words
A METHOD OF GROWING CRYSTALS FROM A MELT THAT COMPRISES MAINTAINING THE MELT AT A TEMPERATURE AT WHICH A CRYSTAL WILL GROW THEREFROM, BRINGING A SEED CRYSTAL INTO CONTACT WITH THE SURFACE OF THE MELT AND WITHDRAWING IT AT A RATE SUCH AS WILL DRAW A CRYSTAL THEREON, AND APPLYING SUPPLEMENTAL HEAT TO A CENTRAL PORTION AT THE BOTTOM OF SAID MELT TO PRODUCE A SUBSTANTIALLY PLANAR INTERFACE BETWEEN SAID CRYSTAL AND SAID MELT DURING THE CRYSTAL GROWING PROCESS.
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) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |