US2970040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of silicon halides
Assignee: Merck and Co Inc
•
Filing: 1958-03-07
•
Granted: 1961-01-31
•
Expires: 1978-03-07
Abstract
No abstract record available.
Inventors
- 👤 John B Conn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:33
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A PROCESS FOR PURIFYING A SILICON HALIDE CONTAINING TRACE AMOUNTS OF CONTAMINATING COMPOUNDS WHICH COMPRISES CONTACTING SAID SILICON HALIDE WITH A DINITRILE COMPOUND OF THE FORMULA-
Claim 2
Dependent Claim
26 words
A PROCESS FOR PURIFYING A SILICON HALIDE CONTAINING TRACE AMOUNTS OF CONTAMINATING COMPOUNDS WHICH COMPRISES CONTACTING SAID SILICON HALIDE WITH A DINITRILE COMPOUND OF THE FORMULA-
References Cited (Backward Citations)
GB656098A
Cited
US2857249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |