US3227607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of adding silica pigments to newsprint pulp to improve ink strike properties of the newsprint and pigment therefor
Assignee: JM Huber Corp
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Filing: 1963-10-15
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Granted: 1966-01-04
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Expires: 1983-10-15
Abstract
No abstract record available.
Inventors
- 👤 Robert K Mays
- 👤 Millman Nathan
- 👤 Frank R Trowbridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:52
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/36; C01B33/38; C01B33/42; D; D21; D21H; D21H17/00; D21H17/63; D21H17/67; D21H17/68; B; B82; B82Y; B82Y30/00; C01B33/26; C01B33/40; C01B33/46; C09; C09C; C09C1/00; C09C1/0081; C09C1/40; C09C1/405; C01P; C01P2002/00; C01P2002/02; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/60; C01P2004/64; C01P2006/00; C01P2006/12; C01P2006/19; C01P2006/60; C01P2006/80
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
A METHOD OF IMPROVING THE INK STRIKE THROUGH PROPERTIES OF NEWSPRINT WHICH COMPRISES ADDING A FILLER PIGMENT TO AN AQUEOUS SLURRY NEWSPRINT PULP IN SUFFICIENT AMOUNTS TO RESULT IN FROM 1% TO 6% ASH, SAID FILLER PIGMENT BEING SELECTED FROM THE GROUP CONSISTING OF PRENUCLEATED SODIUM ALUMINO SILICATE, HYDRATED SILICA, AND A PHYSICAL-CHEMICAL COMBINATION PIGMENT OF 25% SODIUM ALUMINO SILICAE AND 75% HYDRATED SILICA, EACH PIGMENT BEING A WHITE, AMORPHOUS, PARTICULATE MATERIAL WITH A MEAN PARTICLE SIZE OF 0.02 TO 0.04 MICRON, AN OIL ABSORPTION TO MEAN PARTICLE SIZE RATIO OF AT LEAST 7000 AND A SPHERICAL PARTICLE SHAPE AND THEN FORMING A SHEET.
Claim 2
Independent Claim
104 words
A METHOD OF IMPROVING THE INK STRIKE THROUGH PROPERTIES OF NEWSPRINT WHICH COMPRISES ADDING A FILLER PIGMENT TO AN AQUEOUS SLURRY NEWSPRINT PULP IN SUFFICIENT AMOUNTS TO RESULT IN FROM 1% TO 6% ASH, SAID FILLER PIGMENT BEING SELECTED FROM THE GROUP CONSISTING OF PRENUCLEATED SODIUM ALUMINO SILICATE, HYDRATED SILICA, AND A PHYSICAL-CHEMICAL COMBINATION PIGMENT OF 25% SODIUM ALUMINO SILICAE AND 75% HYDRATED SILICA, EACH PIGMENT BEING A WHITE, AMORPHOUS, PARTICULATE MATERIAL WITH A MEAN PARTICLE SIZE OF 0.02 TO 0.04 MICRON, AN OIL ABSORPTION TO MEAN PARTICLE SIZE RATIO OF AT LEAST 7000 AND A SPHERICAL PARTICLE SHAPE AND THEN FORMING A SHEET.
Claim 3
Dependent Claim
63 words
A SYNTHETIC FILLER PIGMENT SUITABLE FOR USE IN NEWSPRINT, COMPRISING A PHYSICAL-CHEMICAL COMBINATION OF 75% BY WEIGHT HYDRATED SILICA AND 25% BY WEIGHT SODIUM ALUMINOSILICATE, SAID PIGMENT CHARACTERIZED AS BEING AN AMORPHOUS, WHITE, PARTICULATE MATERIAL WITH A MEAN PARTICLE SIZE OF FROM 0.02 TO 0.04 MICRON, AN OIL ABSORPTION TO MEAN PARTICLE SIZE RATIO OF AT LEAST 7000 AND A SPHERICAL PARTICLE SHAPE.
Claim 4
Dependent Claim
63 words
A SYNTHETIC FILLER PIGMENT SUITABLE FOR USE IN NEWSPRINT, COMPRISING A PHYSICAL-CHEMICAL COMBINATION OF 75% BY WEIGHT HYDRATED SILICA AND 25% BY WEIGHT SODIUM ALUMINOSILICATE, SAID PIGMENT CHARACTERIZED AS BEING AN AMORPHOUS, WHITE, PARTICULATE MATERIAL WITH A MEAN PARTICLE SIZE OF FROM 0.02 TO 0.04 MICRON, AN OIL ABSORPTION TO MEAN PARTICLE SIZE RATIO OF AT LEAST 7000 AND A SPHERICAL PARTICLE SHAPE.
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |