Patent US4157921A successfully refreshed from Google Patents.
US4157921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oven cleaning method and composition
Assignee: Reckitt and Colman Subsidiary Corp
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Filing: 1978-02-13
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Granted: 1979-06-12
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Expires: 1998-02-13
Abstract
Abstract A thixotropic oven cleaning composition, suitable for use in a pump spray, comprising water, 1 to 7% of an alkali selected from sodium hydroxide, potassium hydroxide and lithium hydroxide, a first thickener, a surfactant, a humectant, an organic solvent and a second thickener comprising a thixotropic emulsion of a copolymer of acrylic acid and ethylene, upon shaking, liquefies so that it can be pump sprayed onto soiled oven surfaces. The composition resolidifies upon contacting the oven surfaces and is removed therefrom after reacting with the soil.
Inventors
- 👤 Susan E. Baturay
- 👤 Daniel S. Dzury
- 👤 William J. Lueschen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:56
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/0008; C11D17/003; C11D3/00; C11D3/0005; C11D3/0057; C11D3/02; C11D3/04; C11D3/044; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3765
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
A thixotropic oven cleaning composition, suitable for use in a pump spray, comprising water, 1 to 7% of an alkali selected from the group consisting of sodium hydroxide, potassium hydroxide and lithium hydroxide, 0.2 to 5% of a first thickener, 0.01 to 1% of a surfactant, 1-15% of a humectant, 1-20% of an organic solvent and 0.5 to 10% of a second thickener comprising a thixotropic emulsion of a copolymer of acrylic acid and ethylene.
Claim 2
Dependent Claim
75 words
A thixotropic oven cleaning composition, suitable for use in a pump spray, comprising water, 1 to 7% of an alkali selected from the group consisting of sodium hydroxide, potassium hydroxide and lithium hydroxide, 0.2 to 5% of a first thickener, 0.01 to 1% of a surfactant, 1-15% of a humectant, 1-20% of an organic solvent and 0.5 to 10% of a second thickener comprising a thixotropic emulsion of a copolymer of acrylic acid and ethylene.
Claim 3
Dependent Claim
20 words
The oven cleaning composition of claim 1, wherein said alkali is present in the amount of about 1 to 4%.
Claim 4
Dependent Claim
13 words
The oven cleaning composition of claim 2, wherein said alkali is sodium hydroxide.
Claim 5
Dependent Claim
18 words
The oven cleaning composition of claim 3, wherein said thixotropic emulsion is emulsified with a tall-oil morpholine soap.
Claim 6
Dependent Claim
43 words
The oven cleaner composition of claim 4, wherein 0.2 to 2% of the first thickener, 0.01 to 1% of the surfactant, 1 to 5% of the humectant, 1 to 10% of organic solvent, and 1 to 6% of the thixotropic emulsion are present.
Claim 7
Dependent Claim
62 words
The method of removing oven soil from oven surfaces comprising applying to the soiled oven surface an effective amount of the composition of claim 1 to an oven at a temperature from ambient to an oven about 200° F. for a time sufficient to effect reaction between the soil and the oven cleaner and removing the reaction product from the oven surface.
Claim 8
Dependent Claim
21 words
The method of claim 6, wherein the alkali is sodium hydroxide and is present in the amount of 1 to 4%.
Claim 9
Dependent Claim
16 words
The method of claim 6, wherein the thixotropic emulsion is emulsified with a tall-oil morpholine soap.
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) | 1982-06-11 | 1982-12-11 | 1983-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-11 | 1986-12-11 | 1987-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-11 | 1990-12-11 | 1991-06-12 | $7700.00 | Window Closed / Lapsed |