US4886654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing barium titanates
Assignee: Mitsui Chemicals Inc
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Filing: 1988-06-30
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Granted: 1989-12-12
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Expires: 2008-06-30
Abstract
Abstract A process for producing barium titanates which comprises admixing a titanium alkoxide with a barium salt of a lower carboxylic acid in the presence of an organic solvent containing at least ethylene glycol monomethyl ether to provide a uniform mixture, bringing the mixture in contact with water to form a gelated product and drying and calcining the gelated product.
Inventors
- 👤 Akihito Ohga
- 👤 Akira Itani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:39
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/003; C01G23/006; C01P; C01P2002/00; C01P2002/70; C01P2002/72; Y; Y10; Y10S; Y10S502/00; Y10S502/525
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
61 words
A process for producing barium titanates which comprises admixing a titanium alkoxide with a barium salt of a carboxylic acid having 5 carbon atoms or less in the presence of an organic solvent comprising ethylene glycol monomethyl ether to provide a solution, bringing said solution into contact with water to form a gelated product, and drying and calcining said gelated product.
Claim 2
Dependent Claim
61 words
A process for producing barium titanates which comprises admixing a titanium alkoxide with a barium salt of a carboxylic acid having 5 carbon atoms or less in the presence of an organic solvent comprising ethylene glycol monomethyl ether to provide a solution, bringing said solution into contact with water to form a gelated product, and drying and calcining said gelated product.
Claim 3
Dependent Claim
13 words
The process according to claim 1 wherein said barium salt is barium acetate.
Claim 4
Dependent Claim
33 words
The process according to claim 1 wherein said barium salt is admixed with said titanium alkoxide in such proportions that an atomic ratio of Ba to Ti (Ba/Ti) is not greater than 0.45.
Claim 5
Dependent Claim
17 words
The process according to claim 1 wherein said organic solvent consists essentially of ethylene glycol monomethyl ether.
Claim 6
Dependent Claim
20 words
The process according to claim 1 wherein said organic solvent is a mixture of ethylene glycol monomethyl ether and ethanol.
Claim 7
Dependent Claim
32 words
The process according to claim 1 wherein said organic solvent is used in an amount of from 2 to 30 times the combined weight of said titanium alkoxide and said barium salt.
Claim 8
Dependent Claim
22 words
The process according to claim 1 wherein said drying is carried out at a temperature of from 25° to about 200° C.
Claim 9
Dependent Claim
23 words
The process according to claim 1 wherein said calcining is carried out at a temperature of from about 800° to about 1300° C.
References Cited (Backward Citations)
US3637531A
Cited
US4065544A
Cited
US4058592A
Cited
US4392180A
Cited
US4377840A
Cited
US4627966A
Cited
FR2571713A1
Cited
US4606906A
Cited
US4713233A
Cited
US4640905A
Cited
US4654075A
Cited
US4710227A
Cited
US4764493A
Cited
US4670243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-11 | 1993-06-12 | 1993-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-11 | 1997-06-12 | 1997-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-11 | 2001-06-12 | 2001-12-12 | $7700.00 | Window Closed / Lapsed |