Patent US4935401A successfully refreshed from Google Patents.
US4935401A
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US
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Revealed image system
Assignee: 3M Co
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Filing: 1987-03-10
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Granted: 1990-06-19
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Expires: 2007-03-10
Abstract
Abstract A sheet is provided which upon abrasion of one surface will reveal a preprinted message without removal of a cover layer.
Inventors
- 👤 Daniel B. Pendergrass, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:14
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; A; A63; A63F; A63F3/00; A63F3/06; A63F3/065; A63F3/0685; B41M3/00; B41M3/14; B41M3/142; B41M5/165; A63F3/0665; G; G09; G09F; G09F23/00; G09F2023/0016; Y; Y10; Y10S; Y10S283/00; Y10S283/903
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
94 words
An article having an abrasion generable image on at least one surface thereof said article comprising (1) a substrate consisting essentially of a porous substrate having (2) an imagewise distributed material on at least one surface thereof which is capable of undergoing a visible color change upon reactive contact with a chemical composition and (3) on the other side of said porous substrate a binder layer containing microcapsules, said microcapsules carrying a chemical composition capable of passing through said porous substrate and interacting with said imagewise distributed material to cause a visible color change.
Claim 2
Dependent Claim
94 words
An article having an abrasion generable image on at least one surface thereof said article comprising (1) a substrate consisting essentially of a porous substrate having (2) an imagewise distributed material on at least one surface thereof which is capable of undergoing a visible color change upon reactive contact with a chemical composition and (3) on the other side of said porous substrate a binder layer containing microcapsules, said microcapsules carrying a chemical composition capable of passing through said porous substrate and interacting with said imagewise distributed material to cause a visible color change.
Claim 3
Dependent Claim
14 words
The article of claim 1 wherein said substrate is porous polymeric film or paper.
Claim 4
Dependent Claim
15 words
The article of claim 2 wherein said chemical composition in said microcapsules is a liquid.
Claim 5
Dependent Claim
92 words
The article of claim 3 wherein said imagewise distributed material comprises based on the weight of the total ink composition, about 5 to 55% by weight of a vehicle component which is a non-polymeric, oleophilic, organic, proton donor acid anion having a cationic counter-ion, up to about 70% by weight oil-receptive, particulate filler and up to about 30% by weight thinner and wherein said ink includes at least 5% by weight of at least one color-generating component, the ratio of said filler to said vehicle component being from about 0.5:1 to 6:1.
Claim 6
Dependent Claim
92 words
The article of claim 2 wherein said imagewise distributed material comprises based on the weight of the total ink composition, about 5 to 55% by weight of a vehicle component which is a non-polymeric, oleophilic, organic, proton donor acid anion having a cationic counter-ion, up to about 70% by weight oil-receptive, particulate filler and up to about 30% by weight thinner and wherein said ink includes at least 5% by weight of at least one color-generating component, the ratio of said filler to said vehicle component being from about 0.5:1 to 6:1.
Claim 7
Dependent Claim
15 words
The article of claim 1 wherein said chemical composition in said microcapsules is a liquid.
Claim 8
Dependent Claim
92 words
The article of claim 6 wherein said imagewise distributed material comprises based on the weight of the total ink composition, about 5 to 55% by weight of a vehicle component which is a non-polymeric, oleophilic, organic, proton donor acid anion having a cationic counter-ion, up to about 70% by weight oil-receptive, particulate filler and up to about 30% by weight thinner and wherein said ink includes at least 5% by weight of at least one color-generating component, the ratio of said filler to said vehicle component being from about 0.5:1 to 6:1.
Claim 9
Dependent Claim
14 words
The article of claim 6 wherein said porous substrate comprises a thin foam sheet.
Claim 10
Dependent Claim
14 words
The article of claim 6 wherein said porous substrate is a fused fiber sheet.
Claim 11
Dependent Claim
92 words
The article of claim 1 wherein said imagewise distributed material comprises based on the weight of the total ink composition, about 5 to 55% by weight of a vehicle component which is a non-polymeric, oleophilic, organic, proton donor acid anion having a cationic counter-ion, up to about 70% by weight oil-receptive, particulate filler and up to about 30% by weight thinner and wherein said ink includes at least 5% by weight of at least one color-generating component, the ratio of said filler to said vehicle component being from about 0.5:1 to 6:1.
Claim 12
Dependent Claim
14 words
The article of claim 10 wherein said porous substrate comprises a thin foam sheet.
Claim 13
Dependent Claim
14 words
The article of claim 10 wherein said porous substrate is a fused fiber sheet.
Claim 14
Dependent Claim
14 words
The article of claim 1 wherein said porous substrate comprises a thin foam sheet.
Claim 15
Dependent Claim
14 words
The article of claim 1 wherein said porous substrate is a fused fiber sheet.
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) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |