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US2899453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of diphenylsilanediol
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:46
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0836
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE PROCESS FOR MAKING DIPHENYLSILANEDIOL WHICH CONSISTS ESSENTIALLY OF (1) HYDROLYZING DIPHENYLDICHLOROSILANE WITH WATER, (2) SEPARTING THE FORMED CRUDE DIPHENYLSILANEDIOL, (3) DISSOLVING THE CRUDE DIPHENYLSILANEDIOL IN ACETONE AND NEUTRALIZING THE ACETONE SOLUTION TO A PH OF FROM ABOUT 5.5 TO 6.8 WITH A BICARBONATE SELECTED FROM THE CLASS CONSISTING OF POTASSIUM BICARBONATE AND SODIUM BICARBONATE, (4) PRECIPITATING THE DIPHENYLSILANEDIOL WITH WATER FROM THE ACETONE SOLUTION AND (5) ISOLATING THE FORMED DIPHENYLSILANEDIOL.
Claim 2
Dependent Claim
71 words
THE PROCESS FOR MAKING DIPHENYLSILANEDIOL WHICH CONSISTS ESSENTIALLY OF (1) HYDROLYZING DIPHENYLDICHLOROSILANE WITH WATER, (2) SEPARTING THE FORMED CRUDE DIPHENYLSILANEDIOL, (3) DISSOLVING THE CRUDE DIPHENYLSILANEDIOL IN ACETONE AND NEUTRALIZING THE ACETONE SOLUTION TO A PH OF FROM ABOUT 5.5 TO 6.8 WITH A BICARBONATE SELECTED FROM THE CLASS CONSISTING OF POTASSIUM BICARBONATE AND SODIUM BICARBONATE, (4) PRECIPITATING THE DIPHENYLSILANEDIOL WITH WATER FROM THE ACETONE SOLUTION AND (5) ISOLATING THE FORMED DIPHENYLSILANEDIOL.
References Cited (Backward Citations)
US2590812A
Cited
US2719859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |