US3969280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid air freshener gels
Assignee: SC Johnson and Son Inc
•
Filing: 1975-04-03
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Granted: 1976-07-13
•
Expires: 1995-04-03
Abstract
Abstract An improved air freshener gel which is substantially syneresis-free comprising in an aqueous system from 0.5-10% by weight of CMC, 0.01-10% by weight perfume, a source of trivalent cations selected from chromic ion, aluminum ion or mixtures sufficient to produce a weight ratio of CMC to effective weight of trivalent cation of 1:0.01 to 1:0.1 and water.
Inventors
- 👤 John G. Sayce
- 👤 David J. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:49
CPC Classifications
A; A61; A61L; A61L9/00; A61L9/015; A61L9/04; A61L9/048
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
75 words
An air freshener gel composition consisting essentially of in an aqueous system from 0.5-10% by weight of carboxymethyl cellulose selected from sodium carboxymethyl cellulose and potassium carboxymethyl cellulose; from 0.01-10% by weight of perfume; from 0.05-10% of a surfactant; a source of trivalent cations selected from chromic ions, aluminum ions and mixtures sufficient to produce a weight ratio of carboxymethyl cellulose to effective weight of trivalent cation of 1:0.01 to 1:0.1 and water to 100%.
Claim 2
Dependent Claim
75 words
An air freshener gel composition consisting essentially of in an aqueous system from 0.5-10% by weight of carboxymethyl cellulose selected from sodium carboxymethyl cellulose and potassium carboxymethyl cellulose; from 0.01-10% by weight of perfume; from 0.05-10% of a surfactant; a source of trivalent cations selected from chromic ions, aluminum ions and mixtures sufficient to produce a weight ratio of carboxymethyl cellulose to effective weight of trivalent cation of 1:0.01 to 1:0.1 and water to 100%.
Claim 3
Dependent Claim
24 words
The composition of claim 1 wherein said source of cations is selected from basic chrome sulfate, chromium acetate, aluminum sulfate, aluminum acetate and mixtures.
Claim 4
Dependent Claim
15 words
The composition of claim 2 wherein said source of trivalent cations is basic chrome sulfate.
Claim 5
Dependent Claim
13 words
The composition of claim 1 wherein said trivalent cation is the chromic ion.
Claim 6
Dependent Claim
20 words
The composition of claim 1 wherein said composition additionally included 1-7% of a lower monhydric alcohol having 1-4 carbon atoms.
Claim 7
Dependent Claim
12 words
The composition of claim 1 wherein said ratio is 1:0.03 to 1:0.06.
Claim 8
Dependent Claim
17 words
The composition of claim 1 wherein said surfactant is selected from nonionic surfactants and nonionic hydrocolloid surfactants.
Claim 9
Dependent Claim
12 words
The composition of claim 7 wherein said surfactant is a nonionic surfactant.
Claim 10
Dependent Claim
13 words
The composition of claim 1 which includes from 0-0.5% of a sequestering agent.
Claim 11
Independent Claim
92 words
A method for dispensing a perfume over an extended period of time at a controlled rate comprising exposing a gel comprising in an aqueous system from 0.5-10% by weight of carboxymethyl cellulose; from 0.01-10; % by weight of perfume; from 0.05-10% of a surfactant; a source of trivalent cations selected from chromic ions, aluminum ions and mixtures sufficient to produce a weight ratio of carboxymethyl cellulose to effective weight of trivalent cation of 1:0.01 to 1:0.1 and water to 100% to the atmosphere and allowing the water in said gel to evaporate.
Claim 12
Independent Claim
92 words
A method for dispensing a perfume over an extended period of time at a controlled rate comprising exposing a gel comprising in an aqueous system from 0.5-10% by weight of carboxymethyl cellulose; from 0.01-10; % by weight of perfume; from 0.05-10% of a surfactant; a source of trivalent cations selected from chromic ions, aluminum ions and mixtures sufficient to produce a weight ratio of carboxymethyl cellulose to effective weight of trivalent cation of 1:0.01 to 1:0.1 and water to 100% to the atmosphere and allowing the water in said gel to evaporate.
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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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |