Patent US4618629A successfully refreshed from Google Patents.
US4618629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fragrance-emitting polyurethane foams
Assignee: WM T Burnett and Co Inc
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Filing: 1985-05-29
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Granted: 1986-10-21
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Expires: 2005-05-29
Abstract
Abstract Polyurethane foams having a particulate resin carrying a fragrance incorporated therein during formation of the foam are described. The physical characteristics of the foams are not detrimentally affected by the incorporation of the resin while providing a foam which will release fragrance over an extended time period.
Inventors
- 👤 Michael S. Buchanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:54
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; A; A61; A61L; A61L9/00; A61L9/015; A61L9/04; A61L9/042; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
75 words
A flexible polyurethane foam comprising the foam-forming reaction product of water as a foaming agent, an isocyanate reactive polyol and a polyisocyanate, and including uniformly contained in said foam a fragrance material comprising a finely divided resin carrying a fragrance, said water being present in an amount sufficient to provide a flexible foam and said fragrance material being present in an amount sufficient to provide fragrance-emitting characteristics to said foam for a prolonged time period.
Claim 2
Dependent Claim
75 words
A flexible polyurethane foam comprising the foam-forming reaction product of water as a foaming agent, an isocyanate reactive polyol and a polyisocyanate, and including uniformly contained in said foam a fragrance material comprising a finely divided resin carrying a fragrance, said water being present in an amount sufficient to provide a flexible foam and said fragrance material being present in an amount sufficient to provide fragrance-emitting characteristics to said foam for a prolonged time period.
Claim 3
Dependent Claim
18 words
The flexible polyurethane foam of claim 1 wherein said resin of said fragrance material is a thermoplastic resin.
Claim 4
Dependent Claim
18 words
The flexible polyurethane foam of claim 1 wherein said resin of said fragrance material is a thermosetting resin.
Claim 5
Dependent Claim
15 words
The flexible polyurethane foam of claim 2 wherein said thermoplastic resin is a polyacrylic resin.
Claim 6
Dependent Claim
15 words
The flexible polyurethane foam of claim 3 wherein said thermosetting resin is a polyacrylate copolymer.
Claim 7
Dependent Claim
14 words
The flexible polyurethane foam of claim 1 wherein said reactive polyol is a polyester.
Claim 8
Dependent Claim
14 words
The flexible polyurethane foam of claim 1 wherein said reactive polyol is a polyether.
Claim 9
Dependent Claim
23 words
The flexible polyurethane foam of claim 1 wherein said finely divided resin has a particle size of about 50 to about 450 microns.
Claim 10
Dependent Claim
20 words
The flexible polyurethane foam of claim 8 wherein the finely divided resin has a particle size of about 200 microns.
Claim 11
Independent Claim
94 words
The method of forming a fragrance-emitting flexible polyurethane foam comprising admixing a foam-forming formulation including water as a foaming agent, a reactive polyol, a polyisocyanate, and a fragrance material comprising a finely divided resin carrying a fragrance; subjecting said foaming formulation to foaming conditions to form a flexible polyurethane foam having said fragrance material uniformly contained in said foam, said water being present in an amount sufficient to form a flexible foam and said fragrance material being present in an amount sufficient to provide fragrance-emitting characteristics to said foam for a prolonged time period.
Claim 12
Independent Claim
94 words
The method of forming a fragrance-emitting flexible polyurethane foam comprising admixing a foam-forming formulation including water as a foaming agent, a reactive polyol, a polyisocyanate, and a fragrance material comprising a finely divided resin carrying a fragrance; subjecting said foaming formulation to foaming conditions to form a flexible polyurethane foam having said fragrance material uniformly contained in said foam, said water being present in an amount sufficient to form a flexible foam and said fragrance material being present in an amount sufficient to provide fragrance-emitting characteristics to said foam for a prolonged time period.
Claim 13
Dependent Claim
16 words
The method of claim 10 wherein said resin of said fragrance material is a thermoplastic resin.
Claim 14
Dependent Claim
16 words
The method of claim 10 wherein said resin of said fragrance material is a thermosetting resin.
Claim 15
Dependent Claim
13 words
The method of claim 11 wherein said thermosetting resin is a polyacrylate copolymer.
Claim 16
Dependent Claim
13 words
The method of claim 12 wherein said thermoplastic resin is a polyacrylic resin.
Claim 17
Dependent Claim
12 words
The method of claim 10 wherein said reactive polyol is a polyester.
Claim 18
Dependent Claim
12 words
The method of claim 10 wherein said reactive polyol is a polyether.
Claim 19
Dependent Claim
21 words
The method of claim 10 wherein said finely divided resin has a particle size of about 50 to about 450 microns.
Claim 20
Dependent Claim
18 words
The method of claim 17 wherein the finely divided resin has a particle size of about 200 microns.
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) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |