US4461810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
TiO2 Pigment bearing a coating with cerium cations and sulfate-, phosphate- or silicate anions and laminate and coating containing same
Assignee: EIDP Inc
•
Filing: 1983-04-04
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Granted: 1984-07-24
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Expires: 2003-04-04
Abstract
Abstract A pigment of TiO2 particles coated with alumina, whose particle surfaces have associated with them cerium cations and sulfate-, phosphate or silicate anions, can be used to prepare paper laminates having a high degree of lightfastness.
Inventors
- 👤 Howard W. Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:39
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/63; D21H17/67; D21H17/69; C; C09; C09C; C09C1/00; C09C1/36; C09C1/3607; C09C1/3653; C09C1/3661; D21H27/00; D21H27/18; D21H27/22; D21H27/26; D21H27/28; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/27; Y10T428/273; Y10T428/277; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31964
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
41 words
A pigment of rutile TiO 2 particles bearing coatings consisting of alumina or alumina-silica, the particle surfaces having associated therewith 0.5-2%, by weight of the TiO 2 , of cerium cations and a stoichiometric amount of sulfate-, phosphate or silicate anions.
Claim 2
Dependent Claim
41 words
A pigment of rutile TiO 2 particles bearing coatings consisting of alumina or alumina-silica, the particle surfaces having associated therewith 0.5-2%, by weight of the TiO 2 , of cerium cations and a stoichiometric amount of sulfate-, phosphate or silicate anions.
Claim 3
Dependent Claim
16 words
A paper laminate comprising paper and a pigment according to claim 1, in a rigid matrix.
Claim 4
Dependent Claim
20 words
A coating composition comprising (a) a pigment according to claim 1, (b) a film-forming material, and (c) a liquid carrier.
References Cited (Backward Citations)
GB1023590A
Cited
US3513007A
Cited
US3767455A
Cited
US3804655A
Cited
US3960589A
Cited
US4239548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |