Patent US3023087A successfully refreshed from Google Patents.
US3023087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of extremely pure silicon
Assignee: Wacker Chemie AG
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Filing: 1958-09-04
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Granted: 1962-02-27
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Expires: 1978-09-04
Abstract
No abstract record available.
Inventors
- 👤 Enk Eduard
- 👤 Nickl Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:08
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS FOR THE PRODUCTION OF PURE CRYSTALLINE SILICON WHICH COMPRISES CONTACTING TRICHLOROSILANE IN A REACTION VESSEL WITH A SILICON BODY OUT OF CONTACT WITH THE WALLS OF SAID REACTION VESSEL, SAID SILICON BODY BEING HEATED TO 850 TO 1050*C. BY ELECTRIC HIGH FREQUENCY HEATING, THE WALLS OF SAID REACTION VESSEL BEING COOLED SUFFICIENTLY TO CONDENSE VAPOROUS PRODUCTS IN THE REACTION MIXTURE THEREIN AND SIMULTANEOUSLY CONTINUOUSLY REMOVING BY-PRODUCTS AND IMPURITIES FROM THE NEIGHBORHOOD OF THE HEATED SILICON BODY WITH THE AID OF THE LIQUID PRODUCTS CONDENSING ON THE COOLED WALLS OF THE REACTION VESSEL.
Claim 2
Dependent Claim
94 words
A PROCESS FOR THE PRODUCTION OF PURE CRYSTALLINE SILICON WHICH COMPRISES CONTACTING TRICHLOROSILANE IN A REACTION VESSEL WITH A SILICON BODY OUT OF CONTACT WITH THE WALLS OF SAID REACTION VESSEL, SAID SILICON BODY BEING HEATED TO 850 TO 1050*C. BY ELECTRIC HIGH FREQUENCY HEATING, THE WALLS OF SAID REACTION VESSEL BEING COOLED SUFFICIENTLY TO CONDENSE VAPOROUS PRODUCTS IN THE REACTION MIXTURE THEREIN AND SIMULTANEOUSLY CONTINUOUSLY REMOVING BY-PRODUCTS AND IMPURITIES FROM THE NEIGHBORHOOD OF THE HEATED SILICON BODY WITH THE AID OF THE LIQUID PRODUCTS CONDENSING ON THE COOLED WALLS OF THE REACTION VESSEL.
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) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |