Patent US5049309A successfully refreshed from Google Patents.
US5049309A
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US
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Titania sol
Assignee: Ishihara Sangyo Kaisha Ltd
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Filing: 1987-09-18
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Granted: 1991-09-17
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Expires: 2007-09-18
Abstract
Abstract Disclosed is a process for producing a titania sol which comprises an aqueous dispersion of finely-divided titania dispersed therein and has a neutral pH range. The process comprises peptizing hydrous titanium oxides with a monobasic acid or salt thereof to obtain an acidic titania sol and removing anions from the acidic titania sol.
Inventors
- 👤 Masashi Sakamoto
- 👤 Haruo Okuda
- 👤 Setuo Koike
- 👤 Yasuo Yamasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:24
CPC Classifications
A; A61; A61Q; A61Q17/00; A61Q17/04; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/29; B; B82; B82Y; B82Y30/00; C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01P; C01P2004/00; C01P2004/60; C01P2004/62; C01P2004/64
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
44 words
A titania sol having a neutral pH range, comprising an aqueous dispersion containing more than 80% hydrous titanium oxide particles having a maximum particle size less than 0.1 μm and at lest one dispersion-stabilizer selected from water-soluble organic compounds and inorganic surface active agents.
Claim 2
Dependent Claim
44 words
A titania sol having a neutral pH range, comprising an aqueous dispersion containing more than 80% hydrous titanium oxide particles having a maximum particle size less than 0.1 μm and at lest one dispersion-stabilizer selected from water-soluble organic compounds and inorganic surface active agents.
Claim 3
Dependent Claim
20 words
The titania sol according to claim 1, containing 1 to 40 wt% of finely-divided titania in terms of TiO.sub. 2.
Claim 4
Dependent Claim
34 words
The titania sol according to claim 1, wherein said water-soluble organic compound is at least one compound selected from water-soluble high molecular compounds, nonionic surface active agents, cationic surface active agents and polyhydric alcohols.
Claim 5
Dependent Claim
16 words
The titania sol according to claim 3, wherein said water-soluble high molecular compound is polyvinyl alcohol.
Claim 6
Dependent Claim
20 words
The titania sol according to claim 3, wherein said nonionic surface active agent is a polyoxyethylene alkyl phenyl ether derivative.
Claim 7
Dependent Claim
13 words
The titania sol according to claim 3, wherein said polyhydric alcohol is glycerin.
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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) | 1994-09-16 | 1995-03-18 | 1995-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-16 | 1999-03-18 | 1999-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-16 | 2003-03-18 | 2003-09-17 | $7700.00 | Window Closed / Lapsed |