US2927938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of chlorofluorosilanes by the selective fluorination of chloro-alkoxysilanes with boron trifluoride
Assignee: ATK Launch Systems LLC
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Filing: 1956-11-02
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Granted: 1960-03-08
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Expires: 1976-11-02
Abstract
No abstract record available.
Inventors
- 👤 Murray S Cohen
- 👤 Green Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:57
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C07F7/1872; C07F7/1888; C07F7/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
30 words
THE METHOD OF MAKING MONOALKYLCHLOROFLUOROSILANE WHICH COMPRISES REACTING AN EXCESS OF BORON TRIFLUORIDE WITH A MONOALKYCHLOROALKOSYSILANE TO CAUSE ONLY THE ALKOXY GROUPS OF THE SILANE TO BE REPLACED BY FLUORINE.
Claim 2
Independent Claim
30 words
THE METHOD OF MAKING MONOALKYLCHLOROFLUOROSILANE WHICH COMPRISES REACTING AN EXCESS OF BORON TRIFLUORIDE WITH A MONOALKYCHLOROALKOSYSILANE TO CAUSE ONLY THE ALKOXY GROUPS OF THE SILANE TO BE REPLACED BY FLUORINE.
Claim 3
Independent Claim
31 words
THE METHOD OF MAKING A NONOARYLCHLOROFLUOROSILANE WHICH COMPRISES REACTING AN EXCESS OF BORON TRIFLUORIDE WITH A MONOARYCHLOROALKOXYSILANE TO CAUSE THE ALKOXY GROUPS ONLY OF SAID SILANE TO BE REPLACED BY FLUORINE.
Claim 4
Independent Claim
31 words
THE METHOD OF MAKING A NONOARYLCHLOROFLUOROSILANE WHICH COMPRISES REACTING AN EXCESS OF BORON TRIFLUORIDE WITH A MONOARYCHLOROALKOXYSILANE TO CAUSE THE ALKOXY GROUPS ONLY OF SAID SILANE TO BE REPLACED BY FLUORINE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |