Patent US5342858A successfully refreshed from Google Patents.
US4487801A
Expired / Lapsed
US
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Fragrance-releasing pull-apart sheet
Assignee: 3M Co
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Filing: 1983-10-11
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Granted: 1984-12-11
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Expires: 2003-10-11
Abstract
Abstract Microcapsules containing material therein can be burst to release the encapsulated material when the capsules are contained in an adhesive securing two surfaces together and the surfaces are pulled apart.
Inventors
- 👤 Everett M. Turnbull
- 👤 Jack W. Charbonneau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:00
CPC Classifications
A; A45; A45D; A45D37/00; B; B32; B32B; B32B29/00; B32B29/002; B32B29/005; A45D40/00; A45D40/0087; A61; A61L; A61L9/00; A61L9/015; A61L9/04; A61L9/12; A63; A63F; A63F3/00; A63F3/06; A63F3/065; A63F3/0685; B32B27/00; B32B27/06; B32B27/08; B32B27/10; B32B27/18; B32B7/00; B32B7/04; B32B7/12; D; D06; D06M; D06M23/00; D06M23/12; A63F2250/00; A63F2250/02; A63F2250/021; B32B2255/00; B32B2255/12; Y; Y10; Y10S; Y10S283/00; Y10S283/903; Y10S428/00; Y10S428/905; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249972; Y10T428/25; Y10T428/254
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
112 words
A device for exposing a liquid to the atmosphere so as to enable said liquid to react, or at least partially evaporate, said device comprising (1) at least two sheets bound by a single layer of a non-pressure sensitive adhesive composition layer, (2) said adhesive composition layer containing microcapsules with said liquid within the shell of the microcapsules, and (3) said microcapsules having an average diameter between 8 and 30 micrometers, the cohesive strength of the adhesive composition layer being less than the strength of the bond between said adhesive composition and said sheets, and the tensile rupture strength of said microcapsules being less than the cohesive strength of the adhesive composition.
Claim 2
Independent Claim
112 words
A device for exposing a liquid to the atmosphere so as to enable said liquid to react, or at least partially evaporate, said device comprising (1) at least two sheets bound by a single layer of a non-pressure sensitive adhesive composition layer, (2) said adhesive composition layer containing microcapsules with said liquid within the shell of the microcapsules, and (3) said microcapsules having an average diameter between 8 and 30 micrometers, the cohesive strength of the adhesive composition layer being less than the strength of the bond between said adhesive composition and said sheets, and the tensile rupture strength of said microcapsules being less than the cohesive strength of the adhesive composition.
Claim 3
Dependent Claim
11 words
The device of claim 1 wherein said sheets are flexible sheets.
Claim 4
Dependent Claim
20 words
The device of claim 2 wherein said flexible sheets are selected from the group consisting of paper and polymeric film.
Claim 5
Dependent Claim
17 words
The device of claim 1 wherein said microcapsules have an average diameter between 12 and 30 micrometers.
Claim 6
Dependent Claim
17 words
The device of claim 2 wherein said microcapsules have an average diameter between 14 and 26 micrometers.
Claim 7
Dependent Claim
17 words
The device of claim 3 wherein said microcapsules have an average diameter between 14 and 26 micrometers.
Claim 8
Dependent Claim
22 words
The device of claim 1 wherein said microcapsules comprise gelatin and are between 35 and 60% by volume of said adhesive composition.
Claim 9
Dependent Claim
19 words
The device of claim 3 wherein said microcapsules comprise between 50 and 85% by volume of said adhesive composition.
Claim 10
Dependent Claim
18 words
The device of claim 4 wherein said microcapsules comprise between 50 and 85% by volume of adhesive composition.
Claim 11
Dependent Claim
19 words
The device of claim 6 wherein said microcapsules comprise between 50 and 85% by volume of said adhesive composition.
Claim 12
Dependent Claim
23 words
The device of claim 1 wherein said liquid is an odor releasing material and the shell of said microcapsule comprises a urea-formaldehyde resin.
Claim 13
Dependent Claim
13 words
The device of claim 2 wherein said liquid is an odor releasing material.
Claim 14
Dependent Claim
13 words
The device of claim 3 wherein said liquid is an odor releasing material.
Claim 15
Dependent Claim
13 words
The device of claim 4 wherein said liquid is an odor releasing material.
Claim 16
Dependent Claim
13 words
The device of claim 6 wherein said liquid is an odor releasing material.
Claim 17
Dependent Claim
13 words
The device of claim 8 wherein said liquid is an odor releasing material.
Claim 18
Dependent Claim
12 words
The device of claim 3 wherein said adhesive is a water-remoistenable adhesive.
Claim 19
Dependent Claim
12 words
The device of claim 6 wherein said adhesive is a water-remoistenable adhesive.
Claim 20
Dependent Claim
12 words
The device of claim 13 wherein said adhesive is a water-remoistenable adhesive.
Claim 21
Dependent Claim
14 words
The device of claim 19 wherein said sheets comprise overlying portions of an envelope.
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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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |