US3725539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of alkaline earth metal titanate
Assignee: Dow Chemical Co
•
Filing: 1971-04-28
•
Granted: 1973-04-03
•
Expires: 1991-04-28
Abstract
Abstract An alkaline earth metal titanate is prepared by reacting an aqueous solution of titanium tetrachloride, an alkaline earth metal anion source, and a hydroxyl ion source to produce an alkaline earth metal titanate precipitate which is separated from the residual aqueous solution.
Inventors
- 👤 S Spangenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:41
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/003; C01G23/006
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
18 words
The method of claim 1 wherein the barium ion source and the hydroxide ion source are barium hydroxide.
Claim 2
Dependent Claim
18 words
The method of claim 1 wherein the strontium ion source and the hydroxyl ion source are strontium hydroxide.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the barium ion source is barium oxide and the hydroxyl ion source is sodium hydroxide.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein the barium ion source is barium hydroxide and the hydroxyl ion source is sodium hydroxide and barium hydroxide.
Claim 5
Dependent Claim
37 words
The method of claim 1 wherein the reactants are present in amounts to provide a concentration of at least about 0.02 molar titanium ion about 0.02 molar barium or strontium ion, and about 0.04 molar hydroxyl ion.
Claim 6
Dependent Claim
24 words
The method of claim 1 wherein the reaction is carried out at a temperature within the range of from about 50* to about 100*C.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |