US2820698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for purifying silicon halide
Assignee: EIDP Inc
•
Filing: 1954-06-25
•
Granted: 1958-01-21
•
Expires: 1974-06-25
Abstract
No abstract record available.
Inventors
- 👤 Ignace J Krchma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:40
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR PURIFYING A SILICON HALIDE, CONTAINING ONLY TRACE AMOUNTS OF CONTAMINATING COMPOUNDS, CONSISTING ESSENTIALLY OF ADDING TO SAID HALIDE FROM ABOUT 0.1 TO 50 MOLS OF WATER PER 100 MOLS OF SILICON HALIDE TO BE PURIFIED, AGITATING THE RESULTING MIXTURE AND SEPARATING THEREFROM THE PRODUCTS RESULTING FROM THE WATER ADDITION AND RECOVERING A PURIFIED SILICON HALIDE.
Claim 2
Dependent Claim
58 words
A PROCESS FOR PURIFYING A SILICON HALIDE, CONTAINING ONLY TRACE AMOUNTS OF CONTAMINATING COMPOUNDS, CONSISTING ESSENTIALLY OF ADDING TO SAID HALIDE FROM ABOUT 0.1 TO 50 MOLS OF WATER PER 100 MOLS OF SILICON HALIDE TO BE PURIFIED, AGITATING THE RESULTING MIXTURE AND SEPARATING THEREFROM THE PRODUCTS RESULTING FROM THE WATER ADDITION AND RECOVERING A PURIFIED SILICON HALIDE.
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) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |