Patent US3268301A successfully refreshed from Google Patents.
US3268301A
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Method of pulling a semiconductor crystal from a melt
Assignee: Siemens and Halske AG
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Filing: 1963-12-02
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Granted: 1966-08-23
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Expires: 1983-12-02
Abstract
No abstract record available.
Inventors
- 👤 Rummel Theodor
- 👤 Dorner Jorg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:07
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/14; C30B15/18; C30B13/00; C30B13/16; C30B13/28; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S117/00; Y10S117/917; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1076; Y10T117/1088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
THE METHOD OF PULLING A SEMICONDUCTOR CRYSTAL FROM A MELT OF THE SEMICONDUCTOR MATERIAL WITH THE AID OF A CRYSTAL SEED, WHICH COMPRISES PULLING A SEED CRYSTAL FROM A CRUICIBLE-FREE MELT ZONE PASSING DURING THE ENTIRE PULLING OPERATION AN ELECTRIC DIRECT CURRENT SERIALLY THROUGH THE CRYSTAL BEING PULLED AND THEN THE MELT IN A DIRECTION OP-
Claim 2
Independent Claim
56 words
THE METHOD OF PULLING A SEMICONDUCTOR CRYSTAL FROM A MELT OF THE SEMICONDUCTOR MATERIAL WITH THE AID OF A CRYSTAL SEED, WHICH COMPRISES PULLING A SEED CRYSTAL FROM A CRUICIBLE-FREE MELT ZONE PASSING DURING THE ENTIRE PULLING OPERATION AN ELECTRIC DIRECT CURRENT SERIALLY THROUGH THE CRYSTAL BEING PULLED AND THEN THE MELT IN A DIRECTION OP-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |