US3265470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for floating-zone melting of semiconductor material
Assignee: Siemens Schuckertwerke AG
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Filing: 1960-08-12
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Granted: 1966-08-09
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Expires: 1980-08-12
Abstract
No abstract record available.
Inventors
- 👤 Keller Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:58
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/28; C30B13/30; H; H05; H05B; H05B6/00; H05B6/02; H05B6/06; H05B6/22; H05B6/30; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1004; Y10T117/1008; Y10T117/1024; Y10T117/1076; Y10T117/1084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
IN A METHOD FOR FLOATING-ZONE MELTING OF SEMI-CONDUCTOR MATERIALS IN WHICH A MOLTEN ZONE LOCATED BETWEEN TWO END PORTIONS OF A SEMICONDUCTOR ROD IS PASSED LONGITUDINALLY ALONG THE ROD, THE MOLTEN ZONE BEING PRO-
Claim 2
Dependent Claim
34 words
IN A METHOD FOR FLOATING-ZONE MELTING OF SEMI-CONDUCTOR MATERIALS IN WHICH A MOLTEN ZONE LOCATED BETWEEN TWO END PORTIONS OF A SEMICONDUCTOR ROD IS PASSED LONGITUDINALLY ALONG THE ROD, THE MOLTEN ZONE BEING PRO-
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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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |