US2877097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of purification of silicon compounds
Assignee: Individual
•
Filing: 1958-05-06
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Granted: 1959-03-10
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Expires: 1978-05-06
Abstract
No abstract record available.
Inventors
- 👤 Guenter A Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:37
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/04; C; C01; C01B; C01B33/00; C01B33/08; C01B33/107; C01B33/10778
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
METHOD OF PURIFYING SILICON TETRACHLORIDE OF TRACES OF BORON TRICHLORIDE COMPRISING PASSING THE SILICON TETRACHLORIDE TO BE PURIFIED THRU ABSORPTION COLUMNS CONTAINING AN ANION EXCHANGE RESIN HAVING ATTACHED TO ITS POLYMER CHAIN A RADICAAL SELECTED FROM THE GROUP CONSISTING OF TERTIARY AMINE RADICALS (-NR2) AND QUATERNARY AMMONIUM RADICALS (-NR3CI) WHEREIN R CONSTITUTES A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALKYL AND PHENYL RADICALS.
Claim 2
Dependent Claim
64 words
METHOD OF PURIFYING SILICON TETRACHLORIDE OF TRACES OF BORON TRICHLORIDE COMPRISING PASSING THE SILICON TETRACHLORIDE TO BE PURIFIED THRU ABSORPTION COLUMNS CONTAINING AN ANION EXCHANGE RESIN HAVING ATTACHED TO ITS POLYMER CHAIN A RADICAAL SELECTED FROM THE GROUP CONSISTING OF TERTIARY AMINE RADICALS (-NR2) AND QUATERNARY AMMONIUM RADICALS (-NR3CI) WHEREIN R CONSTITUTES A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALKYL AND PHENYL RADICALS.
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) | 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 |