Patent FR846774A successfully refreshed from Google Patents.
US3268301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of pulling a semiconductor crystal from a melt
Assignee: Siemens and Halske AG
•
Filing: 1963-12-02
•
Granted: 1966-08-23
•
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 02:45
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-
References Cited (Backward Citations)
US2792317A
Cited
US2932562A
Cited
US2970895A
Cited
US2937216A
Cited
US3058915A
Cited
US3152022A
Cited
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 |