Patent US4925517A successfully refreshed from Google Patents.
US4925517A
Expired / Lapsed
US
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Method of forming fragrance releasing pull-apart sheets
Assignee: 3M Co
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Filing: 1989-07-10
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Granted: 1990-05-15
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Expires: 2009-07-10
Abstract
Abstract Fragrance releasing pull-apart sheets may be more consistently and easily manufactured by coating opposed surfaces with a binder, placing microcapsules between the two surfaces with binder, and adhering the surfaces together with the binder and/or additional binder applied with the capsules.
Inventors
- 👤 Jack W. Charbonneau
- 👤 Jerold O. Bahls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:00
CPC Classifications
A; A61; A61L; A61L9/00; A61L9/015; A61L9/04; A61L9/12; B; B32; B32B; B32B7/00; B32B7/04; B32B7/06; Y; Y10; Y10S; Y10S283/00; Y10S283/903; Y10S428/00; Y10S428/905; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1059; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
71 words
A method of manufacturing liquid releasing devices comprising the steps of: (1) providing two opposed surfaces, (2) coating each of said two opposed surfaces with a binder, (3) applying a composition between said opposed surfaces with a binder, said composition consisting essentially of microcapsules having a liquid fill therein and a liquid carrying medium free of adhesive, and (4) bonding said surfaces together and trapping said microcapsules therebetween with said binder.
Claim 2
Independent Claim
71 words
A method of manufacturing liquid releasing devices comprising the steps of: (1) providing two opposed surfaces, (2) coating each of said two opposed surfaces with a binder, (3) applying a composition between said opposed surfaces with a binder, said composition consisting essentially of microcapsules having a liquid fill therein and a liquid carrying medium free of adhesive, and (4) bonding said surfaces together and trapping said microcapsules therebetween with said binder.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said liquid carrying medium is a solvent for said binder.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein said two opposed surfaces comprise coated paper surfaces.
Claim 5
Dependent Claim
14 words
The method of claim 2 wherein said two opposed surfaces comprise coated paper surfaces.
References Cited (Backward Citations)
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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) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |