# US 7,744,997 B2 · Water contact indicator

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- Number: US 7,744,997 B2
- Document ID: US7744997B2
- Status: Granted
- Kind: B2
- Application number: 11/460,407
- Filed: 2006-07-27
- Published: 2006-11-23
- Granted: 2010-06-29
- Earliest claimed: 2001-10-05
- Assignees: 3M Innovative Properties Company
- Inventors: Russell D. Birkholz; Paul R. LaBrosse; James S. Mrozinski; Ramon T. Ignacio
- Web page: https://patentgrep.com/patent/US7744997B2

## CPC

- G09F 3/0291: {Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time}
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- C09J 7/29: Laminated material (metallised plastics C09J7/22)
- G01N 31/222: {for investigating moisture content}
- C09J 2400/263: in the substrate
- C09J 2400/283: in the substrate
- Y10S 428/913: Material designed to be responsive to temperature, light, moisture
- Y10T 428/24752: Laterally noncoextensive components
- Y10T 428/28: Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T 428/2835: including moisture or waterproof component
- Y10T 428/2848: Three or more layers
- Y10T 442/2738: Coating or impregnation intended to function as an adhesive to solid surfaces subsequently associated therewith
- Y10T 442/2754: Pressure-sensitive adhesive
- G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The present invention discloses an adhesive article. The adhesive article comprises a first layer comprising a transparent film, the first layer having a first major surface and a second major surface. Additionally, the adhesive article comprises a second layer comprising a fluid transport substrate, the second layer having a first major surface and a second major surface, the first major surface of the second layer being in contact with the second major surface of the first layer and a third layer comprising a fluid transportable ink, the third layer being associated with the second major surface of the second layer. The adhesive article then comprises an adhesive layer.

## Claims

### Claim 1

A water contact indicating system comprising
an adhesive article comprising
a first layer comprising a transparent film and an adhesive, the first layer having a first major surface and a second major surface;
a second layer comprising a fluid transport substrate, the second layer having a first major surface and a second major surface, the first major surface of the second layer being partially in contact with the second major surface of the first layer and partially exposed; and
a third layer comprising a fluid transportable ink, the third layer being associated with the second major surface of the second layer; and
a device in contact with the third layer,
wherein the first layer extends beyond the second and third layers so that the adhesive is in contact with the device;
and wherein there is a hole through the first layer exposing the second layer.

### Claim 2 (depends on 1)

The article of claim 1 wherein the device is a personal electronic device.

### Claim 3 (depends on 1)

The adhesive article of claim 1 wherein the substrate is water absorbent.

### Claim 4 (depends on 1)

The adhesive article of claim 1 wherein the substrate is porous.

### Claim 5 (depends on 1)

The adhesive article of claim 1 wherein the substrate is a cellulose-based paper.

### Claim 6 (depends on 1)

The adhesive article of claim 1 wherein the fluid transportable ink comprises a water soluble ink.

### Claim 7 (depends on 1)

The adhesive article of claim 1 wherein the fluid transportable ink comprises a dye.

### Claim 8 (depends on 1)

The adhesive article of claim 1 wherein the first layer further comprises indicia printed on the first major surface.