US2814635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing silicic acid esters
Assignee: Kali Chemie AG
•
Filing: 1954-08-04
•
Granted: 1957-11-26
•
Expires: 1974-08-04
Abstract
No abstract record available.
Inventors
- 👤 Scheel Kurt
- 👤 Schmidt Hans Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:20
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN A PROCESS OF PRODUCING SILICIC ACID ESTERS BY REACTING SILICON TETRAFLUORIDE WITH A LOWER ALIPHATIC ALCO-HOL IN THE PRESENCE OF AMMONIA, THE STEP WHICH COMPRISES REACTING, THE THE GASEOUS PHASE, SILICON TETRAFLUORIDE WITHTH A LOWER ALIPHATIC ALCOHOL AND AMMONIA AT A TEMPERATURE JUST ABOVE THE TEMPERATURE AT WHICH SEPARATION OF THE SILICIC ACID ESTER IN LIQUID FORM FROM THE REACTION MIXTURES TAKES PLACE, SAID SILICON TETRAFLUORIDE, AMMONIA, AND LOWER ALIPHATIC ALCOHOL BEING PRESENT IN THE REACTION MIXTURE IN THE PROPORTION OF ABOUT 3 MOLS OF SILICON TETRAFLUORIDE TO ABOUT 4 MOLS OF AMMONIA TO AT LEAST ABOUT 4 MOLS OF SAID ALCOHOL.
Claim 2
Dependent Claim
103 words
IN A PROCESS OF PRODUCING SILICIC ACID ESTERS BY REACTING SILICON TETRAFLUORIDE WITH A LOWER ALIPHATIC ALCO-HOL IN THE PRESENCE OF AMMONIA, THE STEP WHICH COMPRISES REACTING, THE THE GASEOUS PHASE, SILICON TETRAFLUORIDE WITHTH A LOWER ALIPHATIC ALCOHOL AND AMMONIA AT A TEMPERATURE JUST ABOVE THE TEMPERATURE AT WHICH SEPARATION OF THE SILICIC ACID ESTER IN LIQUID FORM FROM THE REACTION MIXTURES TAKES PLACE, SAID SILICON TETRAFLUORIDE, AMMONIA, AND LOWER ALIPHATIC ALCOHOL BEING PRESENT IN THE REACTION MIXTURE IN THE PROPORTION OF ABOUT 3 MOLS OF SILICON TETRAFLUORIDE TO ABOUT 4 MOLS OF AMMONIA TO AT LEAST ABOUT 4 MOLS OF SAID ALCOHOL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |