US3032575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparation of siliconcyanide compounds
Assignee: Individual
•
Filing: 1960-05-19
•
Granted: 1962-05-01
•
Expires: 1980-05-19
Abstract
No abstract record available.
Inventors
- 👤 Walter O Freitag
- 👤 Evers Ernest Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:45
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
THE PROCESS FOR MAKING TRIMETHYLSILYL CYANIDE WHICH COMPRISES INTRODUCING HYDROCYANIC ACID INTO ETHYL ETHER IN THE PRESENCE OF LITHIUM, ADDING TRIMETHYLSILYL CHLORIDE, AND FRACTIONALLY DISTILLING TRIMETHYLSILYL CYANIDE FROM THE PRODUCT MIXTURE AT ATMOSPHERIC PRESSURE.
Claim 2
Dependent Claim
34 words
THE PROCESS FOR MAKING TRIMETHYLSILYL CYANIDE WHICH COMPRISES INTRODUCING HYDROCYANIC ACID INTO ETHYL ETHER IN THE PRESENCE OF LITHIUM, ADDING TRIMETHYLSILYL CHLORIDE, AND FRACTIONALLY DISTILLING TRIMETHYLSILYL CYANIDE FROM THE PRODUCT MIXTURE AT ATMOSPHERIC PRESSURE.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |