US4719040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of air-freshener gels
Assignee: Naarden International NV
•
Filing: 1985-02-12
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Granted: 1988-01-12
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Expires: 2005-02-12
Abstract
Abstract Process for the preparation of aqueous air freshener gels having an increased perfume content of at least 5% and preferably more than 10% of the total weight of the gel by taking up the perfume in finely divided, porous, water-insoluble, synthetic polymer as the carrier and subsequently combining the thus obtained perfume-laden carrier with an aqueous gel or with the gelforming components.
Inventors
- 👤 Petrus C. Traas
- 👤 Ernst-Ludwig Roehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:14
CPC Classifications
A; A61; A61L; A61L9/00; A61L9/015; A61L9/04; A61L9/048
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
80 words
Process for the preparation of aqueous air freshener gels comprising the steps of: preparing a premix comprising at least 5% by weight of a finely divided porous water-insoluble synthetic polymer and at most 95% by weight of a perfume; preparing a mixture comprising at least 5.1% by weight of this premix and aqueous gel-forming components comprising at least 0.5% by weight of a gelling agent and at most 94.4% by weight of water; and preparing a gel from the mixture.
Claim 2
Dependent Claim
80 words
Process for the preparation of aqueous air freshener gels comprising the steps of: preparing a premix comprising at least 5% by weight of a finely divided porous water-insoluble synthetic polymer and at most 95% by weight of a perfume; preparing a mixture comprising at least 5.1% by weight of this premix and aqueous gel-forming components comprising at least 0.5% by weight of a gelling agent and at most 94.4% by weight of water; and preparing a gel from the mixture.
Claim 3
Dependent Claim
22 words
Process according to claim 1 wherein the premix is prepared by mixing the perfume with the polymer components before or during polymerization.
Claim 4
Dependent Claim
21 words
Process according to claim 1 wherein the premix is prepared by mixing the perfume with a finely divided open-pore porous polymer.
Claim 5
Dependent Claim
18 words
Process according to claim 1 wherein the gel-forming components are first mixed and the premix is added thereafter.
Claim 6
Dependent Claim
24 words
Process according to claim 1 wherein the premix comprises at least 10% by weight of polymer and at most 90% by weight of perfume.
Claim 7
Dependent Claim
20 words
Process according to claim 1 wherein at most 5% by weight of an emulsifier is added together with the premix.
Claim 8
Dependent Claim
66 words
Process for the preparation of aqueous air freshener gels comprising the steps of: preparing a premix comprising at least 10% by weight of a finely divided porous water-insoluble synthetic polymer and at most 90% by weight of a perfume; preparing a mixture comprising: 5.1-35% by weight of the premix, 0-5% by weight of an emulsifier 45-94.4% by weight of water, 0.5-10% by weight of gelling agent
Claim 9
Dependent Claim
66 words
Process for the preparation of aqueous air freshener gels comprising the steps of: preparing a premix comprising at least 10% by weight of a finely divided porous water-insoluble synthetic polymer and at most 90% by weight of a perfume; preparing a mixture comprising: 5.1-35% by weight of the premix, 0-5% by weight of an emulsifier 45-94.4% by weight of water, 0.5-10% by weight of gelling agent
Claim 10
Dependent Claim
25 words
- 5% by weight of polyvalent metal salt, 0-1% by weight of preservative, 0-0.1% by weight of colorant; and preparing a gel from the mixture.
Claim 11
Dependent Claim
25 words
- 5% by weight of polyvalent metal salt, 0-1% by weight of preservative, 0-0.1% by weight of colorant; and preparing a gel from the mixture.
Claim 12
Dependent Claim
22 words
Process according to claim 7 wherein the premix is prepared by mixing the perfume with the polymer components before or during polymerization.
Claim 13
Dependent Claim
21 words
Process according to claim 7 wherein the premix is prepared by mixing the perfume with a finely divided open-pore porous polymer.
Claim 14
Dependent Claim
18 words
Process according to claim 7 wherein the gel-forming components are first mixed and the premix is added thereafter.
Claim 15
Dependent Claim
70 words
Aqueous air freshener gels comprising at least 5.1% by weight of the total gel of a premix prepared from at least 0.5 part by weight of a finely divided porous water-insoluble synthetic polymer and at most 9.5 parts by weight of a perfume, which premix is intimately mixed with aqueous gel-forming components comprising at least 0.5% by weight of a gelling agent and at most 94.4% by weight of water.
Claim 16
Dependent Claim
70 words
Aqueous air freshener gels comprising at least 5.1% by weight of the total gel of a premix prepared from at least 0.5 part by weight of a finely divided porous water-insoluble synthetic polymer and at most 9.5 parts by weight of a perfume, which premix is intimately mixed with aqueous gel-forming components comprising at least 0.5% by weight of a gelling agent and at most 94.4% by weight of water.
Claim 17
Dependent Claim
88 words
Aqueous air freshener gels comprising 5.1-35% by weight of the total gel of a premix prepared from at least 1 part by weight of a finely divided porous water-insoluble synthetic polymer and at most 9 parts by weight of a perfume, which premix is intimately mixed with aqueous gel-forming an auxiliary components comprising: 0-5% by weight of an emulsifier 45-94.4% by weight of water, 0.5-10% by weight of gelling agent, - 5% by weight of polyvalent metal salt, 0-1% by weight of preservative, 0-0.1% by weight of colorant.
Claim 18
Dependent Claim
88 words
Aqueous air freshener gels comprising 5.1-35% by weight of the total gel of a premix prepared from at least 1 part by weight of a finely divided porous water-insoluble synthetic polymer and at most 9 parts by weight of a perfume, which premix is intimately mixed with aqueous gel-forming an auxiliary components comprising: 0-5% by weight of an emulsifier 45-94.4% by weight of water, 0.5-10% by weight of gelling agent, - 5% by weight of polyvalent metal salt, 0-1% by weight of preservative, 0-0.1% by weight of colorant.
References Cited (Backward Citations)
US3446893A
Cited
US3745213A
Cited
US3994439A
Cited
JPS5138436A
Cited
GB1576228A
Cited
JPS5455740A
Cited
US4351754A
Cited
JPS5655372A
Cited
EP0061701A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |