Patent US4878775A successfully refreshed from Google Patents.
US4878775A
Expired / Lapsed
US
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Liquid transfer device
Assignee: 3M Co
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Filing: 1987-10-28
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Granted: 1989-11-07
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Expires: 2007-10-28
Abstract
Abstract A device provides liquid material for application to a surface. The device comprises in order at least a carrying substrate, frangible microcapsules containing the liguid to be applied, a raised area around the microcapsules of a structurally rigid material, and a flexible, liquid permeable material overlaying the microcapsules. Pressure on the liquid permeable material ruptures the microcapsules and enables the liquid to flow through the permeable material.
Inventors
- 👤 R. James Norbury
- 👤 Daniel B. Pendergrass, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:35
CPC Classifications
A; A45; A45D; A45D34/00; A45D34/04; A47; A47L; A47L13/00; A47L13/10; A47L13/16; A47L13/17; A61; A61K; A61K8/00; A61K8/02; A61K8/0208; A61K8/11; A61Q; A61Q19/00; A45D2200/00; A45D2200/10; A45D2200/1009; A45D2200/1018; A45D2200/1036; A45D2200/1045; A45D40/00; A45D40/0087; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412; A61K2800/80; A61K2800/87
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
97 words
An applicator device capable of carrying liquid material to be applied to a surface comprising a flat support layer, liquid containing microcapsules of between 200 and 300 microns on at least one surface of said support layer, a flat structural layer with a hole therein for providing a raised area around all of said microcapsules, and a flexible, liquid-permeable material overlaying the microcapsules, said support layer being less flexible than said liquid permeable material, and said microcapsules being bonded to said support layer by an adhesive, said raised area being above the highest level of said microcapsules.
Claim 2
Dependent Claim
97 words
An applicator device capable of carrying liquid material to be applied to a surface comprising a flat support layer, liquid containing microcapsules of between 200 and 300 microns on at least one surface of said support layer, a flat structural layer with a hole therein for providing a raised area around all of said microcapsules, and a flexible, liquid-permeable material overlaying the microcapsules, said support layer being less flexible than said liquid permeable material, and said microcapsules being bonded to said support layer by an adhesive, said raised area being above the highest level of said microcapsules.
Claim 3
Dependent Claim
25 words
The device of claim 1 wherein said raised area comprises a separate sheet of material with a hole therein that defines walls around said microcapsules.
Claim 4
Dependent Claim
17 words
The device of claim 2 wherein said microcapsules have an average diameter between 200 and 1000 microns.
Claim 5
Dependent Claim
16 words
The device of claim 2 wherein a cover sheet is removably placed over said liquid-permeable material.
Claim 6
Dependent Claim
20 words
The device of claim 1 wherein said raised area is formed by folds, embossment, or shaping of said support means.
Claim 7
Dependent Claim
17 words
The device of claim 5 wherein said microcapsules have an average diameter between 200 and 1000 microns.
Claim 8
Dependent Claim
16 words
The device of claim 5 wherein a cover sheet is removably placed over said liquid-permeable material.
Claim 9
Dependent Claim
16 words
The device of claim 6 wherein a cover sheet is removably placed over said liquid-permeable material.
Claim 10
Dependent Claim
17 words
The device of claim 1 wherein said microcapsules have an average diameter between 200 and 1000 microns.
Claim 11
Dependent Claim
16 words
The device of claim 9 wherein a cover sheet is removably placed over said liquid-permeable material.
Claim 12
Dependent Claim
16 words
The device of claim 1 wherein a cover sheet is removably placed over said liquid-permeable material.
References Cited (Backward Citations)
US2579403A
Cited
US3196478A
Cited
US3334374A
Cited
US3472675A
Cited
US3334790A
Cited
US3516941A
Cited
US3466131A
Cited
US3619842A
Cited
US3640629A
Cited
US3636922A
Cited
US3768916A
Cited
US3806260A
Cited
US3814095A
Cited
WO1981000196A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |