US2877254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing organohalosilanes
Assignee: Wacker Chemie AG
•
Filing: 1955-09-15
•
Granted: 1959-03-10
•
Expires: 1975-09-15
Abstract
No abstract record available.
Inventors
- 👤 Enk Eduard
- 👤 Nitzsche Siegfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:17
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/12; C07F7/16; C01; C01B; C01B33/00; C01B33/02; C01B33/037
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN THE PROCESS FOR THE PRODUCTION OF ORGANOHALOSALINES BY THE REACTION OF AHALOHYDROCARBON WITH SILICON, THE IMPROVEMENT WHICH COMPRISES EMPLOYING SILICON WHICH HAS BEEN PRETREATED BY MIXING THE SILICON IN THE MOLTEN STATE WITH A SLAG-PRODUCING MATERIAL SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM SILICATE, A MIXTURE OF MAGNESIUM AND SILICA, AND A MIXTURE OF MAGNESIUM OXIDE AND SILICA, AND REMOVING THE CALCIUM AND ALUMIUM IMPURITIES IN THE FORMED SLAG, SAID PRETREATMENT BEING CARRIED OUT TO THE EXTENT THAT THE RESULTING PURIFIED SILICON CONTAINS A MIXIMUM OF UP TO 0.2 PERCENT ALUMINUM AND LESS THAN 0.1 PERCENT BY WEIGHT CALCIUM.
Claim 2
Dependent Claim
100 words
IN THE PROCESS FOR THE PRODUCTION OF ORGANOHALOSALINES BY THE REACTION OF AHALOHYDROCARBON WITH SILICON, THE IMPROVEMENT WHICH COMPRISES EMPLOYING SILICON WHICH HAS BEEN PRETREATED BY MIXING THE SILICON IN THE MOLTEN STATE WITH A SLAG-PRODUCING MATERIAL SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM SILICATE, A MIXTURE OF MAGNESIUM AND SILICA, AND A MIXTURE OF MAGNESIUM OXIDE AND SILICA, AND REMOVING THE CALCIUM AND ALUMIUM IMPURITIES IN THE FORMED SLAG, SAID PRETREATMENT BEING CARRIED OUT TO THE EXTENT THAT THE RESULTING PURIFIED SILICON CONTAINS A MIXIMUM OF UP TO 0.2 PERCENT ALUMINUM AND LESS THAN 0.1 PERCENT BY WEIGHT CALCIUM.
References Cited (Backward Citations)
US1037713A
Cited
US1180968A
Cited
US2427605A
Cited
US2488487A
Cited
GB681387A
Cited
US2666775A
Cited
GB708823A
Cited
US2579341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |