US5013603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink jet recording paper with amorphous silica filler
Assignee: Mizusawa Industrial Chemicals Ltd
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Filing: 1990-01-22
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Granted: 1991-05-07
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Expires: 2010-01-22
Abstract
Abstract Disclosed is a filler for ink jet recording paper, said filler being composed of amorphous silica having a median diameter, measured by the coulter counter method, of 2 to 15 mu m, an oil absorption of at least 180 ml/100 g, a refractive index, measured by the solvent method, of at least 1.450, and a moisture absorption, measured when it is caused to absorb moisture for 200 hours at a relative humidity of 90% and a temperature of 25 DEG C., of at least 35%.
Inventors
- 👤 Masahide Ogawa
- 👤 Teiji Sato
- 👤 Masao Takahashi
- 👤 Toshio Kitsu
- 👤 Seikichi Takahashi
- 👤 Kinichi Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:25
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/50; B41M5/52; B41M5/5218; C; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/3045; C01; C01P; C01P2002/00; C01P2002/02; C01P2002/80; C01P2002/84; C01P2004/00; C01P2004/51; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/12; C01P2006/14; C01P2006/19; C01P2006/60; C01P2006/90; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/24934; Y10T428/25; Y10T428/259; Y10T428/27; Y10T428/273; Y10T428/277
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
127 words
An ink jet recording element which comprises a paper substrate and a layer of a filler coated on the surface of the substrate, wherein said filler comprises amorphous silica having (i) a median diameter, measured by the Coulter counter method, of 2 to 15 μm, (ii) an oil absorption of at least 180 ml/100 g, (iii) a refractive index, measured by the solvent method, of at least 1.450, (iv) a specific surface area of 280 to 500 m 2 /g, (v) a pore volume, measured by the nitrogen adsorption method, of more than 1.30 cc/g, and (vi) a moisture absorption, measured when it is caused to absorb moisture for 200 hours at a relatively humidity of 90% and a temperature of 25° C., of at least 35%.
Claim 2
Dependent Claim
127 words
An ink jet recording element which comprises a paper substrate and a layer of a filler coated on the surface of the substrate, wherein said filler comprises amorphous silica having (i) a median diameter, measured by the Coulter counter method, of 2 to 15 μm, (ii) an oil absorption of at least 180 ml/100 g, (iii) a refractive index, measured by the solvent method, of at least 1.450, (iv) a specific surface area of 280 to 500 m 2 /g, (v) a pore volume, measured by the nitrogen adsorption method, of more than 1.30 cc/g, and (vi) a moisture absorption, measured when it is caused to absorb moisture for 200 hours at a relatively humidity of 90% and a temperature of 25° C., of at least 35%.
Claim 3
Dependent Claim
27 words
An ink jet recording element as set forth in claim 1, wherein the amorphous silica is coated in an amount of 3 to 20 g/m 2 .
Claim 4
Dependent Claim
27 words
An ink jet recording element as set forth in claim 1 wherein the pore volume, measured by the nitrogen absorption method, is not greater than 1.80 cc/g.
Claim 5
Dependent Claim
128 words
An ink jet recording element which comprises a paper and a filler incorporated in the paper in an amount of 1 to 20% by weight based on the weight of the paper fibers, wherein said filler comprises amorphous silica having (i) a median diameter, measured by the Coulter counter method, of 2 to 15 μm, (ii) an oil absorption of at least 180 ml/100 g, (iii) a refractive index, measured by the solvent method, of at least 1.450, (iv) a specific surface area of 280 to 500 m 2 /g, (v) a pore volume, measured by the nitrogen adsorption method, of more than 1.30 cc/g, and (vi) a moisture for 200 hours at a relative humidity of 90% and a temperature of 25° C., of at least 35%.
Claim 6
Dependent Claim
128 words
An ink jet recording element which comprises a paper and a filler incorporated in the paper in an amount of 1 to 20% by weight based on the weight of the paper fibers, wherein said filler comprises amorphous silica having (i) a median diameter, measured by the Coulter counter method, of 2 to 15 μm, (ii) an oil absorption of at least 180 ml/100 g, (iii) a refractive index, measured by the solvent method, of at least 1.450, (iv) a specific surface area of 280 to 500 m 2 /g, (v) a pore volume, measured by the nitrogen adsorption method, of more than 1.30 cc/g, and (vi) a moisture for 200 hours at a relative humidity of 90% and a temperature of 25° C., of at least 35%.
Claim 7
Dependent Claim
27 words
An ink jet recording element as set forth in claim 4 wherein the pore volume, measured by the nitrogen absorption method, is not greater than 1.80 cc/g.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-06 | 1994-11-05 | 1995-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-06 | 1998-11-05 | 1999-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-06 | 2002-11-05 | 2003-05-07 | $7700.00 | Window Closed / Lapsed |