US3015592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of growing semiconductor crystals
Assignee: US Philips Corp
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Filing: 1959-06-11
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Granted: 1962-01-02
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Expires: 1979-06-11
Abstract
No abstract record available.
Inventors
- 👤 Leopold Frans Martinus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:40
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/10; C30B15/12; C30B15/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A METHOD OF GROWING HIGH-EQUALITY SEMICONDUCTOR CRYSTALS, COMPRISING THE STEPS OF PROVIDING A MELT OF SEMICONDUCTER MATERIAL, DRAWING A FIRST GROWING TUBULAR CRYSTAL UPWARDS FROM THE MELT, AND, SIMULTANEOUSLY WITH THE LAST STEP, DRAWING A SECOND GROWING SINGLE CRYSTAL UPWARDS FROM THE MELT WITHIN THE FIRST CRYSTAL AND SEPARATE FROM THE LATTER AND SUCH THAT IT NEVER EXTENDS BEYOND THE FIRST CRYSTAL.
Claim 2
Independent Claim
62 words
A METHOD OF GROWING HIGH-EQUALITY SEMICONDUCTOR CRYSTALS, COMPRISING THE STEPS OF PROVIDING A MELT OF SEMICONDUCTER MATERIAL, DRAWING A FIRST GROWING TUBULAR CRYSTAL UPWARDS FROM THE MELT, AND, SIMULTANEOUSLY WITH THE LAST STEP, DRAWING A SECOND GROWING SINGLE CRYSTAL UPWARDS FROM THE MELT WITHIN THE FIRST CRYSTAL AND SEPARATE FROM THE LATTER AND SUCH THAT IT NEVER EXTENDS BEYOND THE FIRST CRYSTAL.
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) | 1965-01-01 | 1965-07-03 | 1966-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-01 | 1969-07-03 | 1970-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-01 | 1973-07-03 | 1974-01-02 | $7700.00 | Window Closed / Lapsed |