Patent US4477518A successfully refreshed from Google Patents.
US4477518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated papers and cardboards and process for their manufacture
Assignee: Individual
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Filing: 1981-09-30
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Granted: 1984-10-16
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Expires: 2001-09-30
Abstract
Abstract Coated papers and cardboards comprising at least one compressible layer of coating containing hollow microspheres filled with a gas that is inert with respect to the microsphere-forming material. The coated papers and cardboards of this invention are used particularly for rotogravure printing. A process for manufacturing these coated papers and cardboards.
Inventors
- 👤 Sauveur Cremona
- 👤 Joel Pijselman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:48
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/50; B41M5/52; D; D21; D21H; D21H19/00; D21H19/66; D21H19/70; D21H21/00; D21H21/50; D21H21/52; D21H21/54; B41M5/502; B41M5/508; B41M5/5254; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249972; Y10T428/25; Y10T428/254; Y10T428/26; Y10T428/27; Y10T428/273; Y10T428/277; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906; Y10T428/31971; Y10T428/31989
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
57 words
A paper or cardboard having a cellulose fiber base covered with at least one compressible coating layer comprising more than about 1 percent by weight of hollow microspheres filled with a gas that is inert with respect to the microsphere-forming material and at least one pigment of less than about 99 percent by weight of the coating.
Claim 2
Dependent Claim
57 words
A paper or cardboard having a cellulose fiber base covered with at least one compressible coating layer comprising more than about 1 percent by weight of hollow microspheres filled with a gas that is inert with respect to the microsphere-forming material and at least one pigment of less than about 99 percent by weight of the coating.
Claim 3
Dependent Claim
36 words
The paper or cardboard according to claim 1 wherein the microspheres constitute more than about 25 percent by weight of the coating and the pigment comprises less than about 75 percent by weight of the coating.
Claim 4
Dependent Claim
19 words
The paper or cardboard according to claim 2 wherein the compressible coating layer further comprises binders or other adjuvants.
Claim 5
Dependent Claim
18 words
The paper or cardboard according to claim 3 wherein the compressible coating layer further comprises an external layer.
Claim 6
Dependent Claim
99 words
A paper or cardboard having a cellulose fiber base covered with at least one compressible coating layer comprising from between 1 and 100% by weight of hollow microspheres filled with a gas that is inert with respect to the microsphere forming material and from between 99 and 1% by weight of at least one pigment, wherein the compressible coating layer further comprises an outside film to improve the surface properties of the paper or cardboard, such film comprising a layer of mineral pigments, a film of an organic polymer with or without such pigments, or an extruded organic polymer.
Claim 7
Dependent Claim
99 words
A paper or cardboard having a cellulose fiber base covered with at least one compressible coating layer comprising from between 1 and 100% by weight of hollow microspheres filled with a gas that is inert with respect to the microsphere forming material and from between 99 and 1% by weight of at least one pigment, wherein the compressible coating layer further comprises an outside film to improve the surface properties of the paper or cardboard, such film comprising a layer of mineral pigments, a film of an organic polymer with or without such pigments, or an extruded organic polymer.
Claim 8
Dependent Claim
27 words
The paper or cardboard according to claim 5 wherein the compressible coating layer is applied in an amount of between about 1 and 10 g/m 2 .
Claim 9
Dependent Claim
21 words
The paper or cardboard according to claim 6 wherein the compressible coating layer has a thickness of at least 2 μm.
Claim 10
Dependent Claim
19 words
The paper or cardboard according to claim 7 wherein the compressible coating layer further comprises binders or other adjuvants.
Claim 11
Dependent Claim
30 words
The paper or cardboard according to claim 8 wherein the microspheres have walls formed by expanded polymers and contain a gas that is inert with respect to the microsphere-forming material.
Claim 12
Dependent Claim
31 words
The paper or cardboard according to claim 9 wherein the polymer forming the walls of the microspheres is polyvinylidene chloride, polystyrene, or a copolymer with a vinylidene chloride and acrylonitrile base.
Claim 13
Dependent Claim
22 words
The paper or cardboard according to claim 10 wherein the gas is isobutane, a chlorinated or chlorofluorinated hydrocarbon, or carbon dioxide gas.
Claim 14
Dependent Claim
118 words
A paper or cardboard having a cellulose fiber base covered with at least one compressible coating layer comprising from between 1 and 100% by weight of hollow microspheres filled with a gas that is inert with respect to the microsphere forming material and from between 99 and 1% by weight of at least one pigment, wherein the compressible coating layer further comprises an outside film to improve the surface properties of the paper or cardboard, such film comprising a layer of mineral pigments, a film of an organic polymer with or without such pigments, or an extruded organic polymer, and wherein the compressible coating layer is applied in an amount of about 2 and 5 g/m 2 .
Claim 15
Dependent Claim
118 words
A paper or cardboard having a cellulose fiber base covered with at least one compressible coating layer comprising from between 1 and 100% by weight of hollow microspheres filled with a gas that is inert with respect to the microsphere forming material and from between 99 and 1% by weight of at least one pigment, wherein the compressible coating layer further comprises an outside film to improve the surface properties of the paper or cardboard, such film comprising a layer of mineral pigments, a film of an organic polymer with or without such pigments, or an extruded organic polymer, and wherein the compressible coating layer is applied in an amount of about 2 and 5 g/m 2 .
Claim 16
Dependent Claim
21 words
The paper or cardboard according to claim 12 wherein the compressible coating layer has a thickness of at least 2 μm.
Claim 17
Dependent Claim
19 words
The paper or cardboard according to claim 13 wherein the compressible coating layer further comprises binders or other adjuvants.
Claim 18
Dependent Claim
30 words
The paper or cardboard according to claim 14 wherein the microspheres have walls formed by expanded polymers and contain a gas that is inert with respect to the microsphere-forming material.
Claim 19
Dependent Claim
31 words
The paper or cardboard according to claim 15 wherein the polymer forming the walls of the microspheres is polyvinylidene chloride, polystyrene, or a copolymer with a vinylidene chloride and acrylonitrile base.
Claim 20
Dependent Claim
22 words
The paper or cardboard according to claim 16 wherein the gas is isobutane, a chlorinated or chlorofluorinated hydrocarbon, or carbon dioxide gas.
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) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |