Patent US2985519A successfully refreshed from Google Patents.
US2985519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of silicon
Assignee: EIDP Inc
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Filing: 1958-06-02
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Granted: 1961-05-23
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Expires: 1978-06-02
Abstract
No abstract record available.
Inventors
- 👤 Denis G Kelemen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:42
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/14; C01; C01B; C01B33/00; C01B33/02; Y; Y10; Y10S; Y10S117/00; Y10S117/90; Y10S117/901; Y10S117/91; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1032; Y10T117/1068
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
AN IMPROVED PROCESS FOR MELTING AND SOLIDIFYING SILICON INTO A SOLID BODY OF UNIFORM COMPOSITION COMPRISING CONDUITING THE FOLLOWING STEPS IN A NONCONTAMINATING ATMOSPHERE: PASSING SILICON INTO THE HIGH FREQUENCY ELECTROMAGNETIC FIELD OF AN INDUCTION COIL WITHIN AN ENCLOSURE CREATED BY A NONCONDUCTING WALL WHICH IS EXTERIORLY CONTACTED WITH A NONCONDUCTING FLUID COOLANT TO MAINTAIN ITS TEMPERATURE BELOW THE MELTING POINT OF SILICON, SAID INDUCTIONN COIL SURROUNDING SAID WALL, MELTING THE SILICON WITH THE ENERGY OF SAID FIELD, AND CON-
Claim 2
Dependent Claim
80 words
AN IMPROVED PROCESS FOR MELTING AND SOLIDIFYING SILICON INTO A SOLID BODY OF UNIFORM COMPOSITION COMPRISING CONDUITING THE FOLLOWING STEPS IN A NONCONTAMINATING ATMOSPHERE: PASSING SILICON INTO THE HIGH FREQUENCY ELECTROMAGNETIC FIELD OF AN INDUCTION COIL WITHIN AN ENCLOSURE CREATED BY A NONCONDUCTING WALL WHICH IS EXTERIORLY CONTACTED WITH A NONCONDUCTING FLUID COOLANT TO MAINTAIN ITS TEMPERATURE BELOW THE MELTING POINT OF SILICON, SAID INDUCTIONN COIL SURROUNDING SAID WALL, MELTING THE SILICON WITH THE ENERGY OF SAID FIELD, AND CON-
References Cited (Backward Citations)
US2768074A
Cited
US2686864A
Cited
US2747971A
Cited
US2893847A
Cited
US2872299A
Cited
US2855335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |