Patent US3259596A successfully refreshed from Google Patents.
US3259596A
Expired / Lapsed
US
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Paper coating composition comprising pigment, starch, butadiene copolymer and styrene-maleic anhydride copolymer
Assignee: Imperial Chemical Industries Ltd
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Filing: 1962-06-11
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Granted: 1966-07-05
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Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Downer John Michael
- 👤 Hobbs Donald Graham
- 👤 Wootton David Brian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:55
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/56; D21H19/58; Y; Y10; Y10S; Y10S524/00; Y10S524/904; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31891; Y10T428/31931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A METHOD OF MAKING A PAPER COATING COMPOSITION WHICH COMPRISES FORMING AN INTIMATE MIXTURE OF MINERAL PIGMENT, STARCH AND A COPOLYMER CONTAINING FROM 30 TO 50% BY WEIGHT OF BUTADIENE-1,3 RESIDUES AND AT LEAST HALF OF THE REMAINDER BEING AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF STYRENE AND METHYL METHACRYLATE RESIDUES, ANY OTHER CONSTITUENT OF THE COPOLYMER BEING DERIVED FROM ANOTHER MONOETHYLENICALLY UNSATURATED COMPOUND, SAID COPOLYMER BEING BROUGHT INTO CONTACT WITH THE STARCH IN THE FORM OF A STABLE DISPERSION CONTAINING AS A STABILIZING AGENT FROM 2 TO 5% BY WEIGHT BASED ON THE WEIGHT OF SAID BUTADIENE-1,3 COPOLYMER OF AN ALKALINE SOLUTION OF A COPOLUMER OF STYRENE AND MALEIC ANHYDRIDE, THERE BEING IN THE COMPOSITION FROM 8 TO 50 PARTS BY WEIGHT OF STARCH AND BUTADIENE-1,3 COPOLYMER TO TOGETHER PER 100 PARTS BY WEIGHT OF PIGMENT AND FROM 0.5 TO 2 PARTS BY WEIGHT OF BUTADIENE-1,3 COPOLYMER TO EACH PART BY WEIGHT OF STARCH.
Claim 2
Independent Claim
158 words
A METHOD OF MAKING A PAPER COATING COMPOSITION WHICH COMPRISES FORMING AN INTIMATE MIXTURE OF MINERAL PIGMENT, STARCH AND A COPOLYMER CONTAINING FROM 30 TO 50% BY WEIGHT OF BUTADIENE-1,3 RESIDUES AND AT LEAST HALF OF THE REMAINDER BEING AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF STYRENE AND METHYL METHACRYLATE RESIDUES, ANY OTHER CONSTITUENT OF THE COPOLYMER BEING DERIVED FROM ANOTHER MONOETHYLENICALLY UNSATURATED COMPOUND, SAID COPOLYMER BEING BROUGHT INTO CONTACT WITH THE STARCH IN THE FORM OF A STABLE DISPERSION CONTAINING AS A STABILIZING AGENT FROM 2 TO 5% BY WEIGHT BASED ON THE WEIGHT OF SAID BUTADIENE-1,3 COPOLYMER OF AN ALKALINE SOLUTION OF A COPOLUMER OF STYRENE AND MALEIC ANHYDRIDE, THERE BEING IN THE COMPOSITION FROM 8 TO 50 PARTS BY WEIGHT OF STARCH AND BUTADIENE-1,3 COPOLYMER TO TOGETHER PER 100 PARTS BY WEIGHT OF PIGMENT AND FROM 0.5 TO 2 PARTS BY WEIGHT OF BUTADIENE-1,3 COPOLYMER TO EACH PART BY WEIGHT OF STARCH.
References Cited (Backward Citations)
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US2651580A
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US2840492A
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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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |