US4124523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone-containing acidic cleaner and conditioner
Assignee: Dow Silicones Corp
•
Filing: 1977-03-07
•
Granted: 1978-11-07
•
Expires: 1997-03-07
Abstract
Abstract Aqueous, acidic compositions are disclosed which consist essentially of polydimethylsiloxane, water, an acid, an abrasive and colloidal silica flocculated with a non-ionic surfactant. The compositions are especially useful for cleaning and conditioning smooth siliceous surfaces such as the surfaces of glass-ceramic cooking utensils and appliances.
Inventors
- 👤 Robert D. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:47
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/0008; C11D17/0013; C11D3/00; C11D3/02; C11D3/12; C11D3/124; C11D3/14; C11D3/16; C11D3/37; C11D3/3703; C11D3/373
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
An aqueous cleaning and conditioning composition consisting essentially of (a) from 0.1 to 10 weight percent, based on the weight of the composition, of a polydimethylsiloxane fluid having a viscosity of from 0.05 to 200 pascal-seconds at 25° C., (b) from 10 to 50 weight percent, based on the weight of the composition, of an abrasive, (c) a colloidal silica, (d) a non-ionic surfactant in sufficient amount to flocculate the colloidal silica, (e) sufficient acid to provide a pH of less than 4.0 for said composition and (f) the balance water, the weight ratio of the total amount of water to the total amount of colloidal silica plus non-ionic surfactant having a value of less than approximately 15.
Claim 2
Dependent Claim
118 words
An aqueous cleaning and conditioning composition consisting essentially of (a) from 0.1 to 10 weight percent, based on the weight of the composition, of a polydimethylsiloxane fluid having a viscosity of from 0.05 to 200 pascal-seconds at 25° C., (b) from 10 to 50 weight percent, based on the weight of the composition, of an abrasive, (c) a colloidal silica, (d) a non-ionic surfactant in sufficient amount to flocculate the colloidal silica, (e) sufficient acid to provide a pH of less than 4.0 for said composition and (f) the balance water, the weight ratio of the total amount of water to the total amount of colloidal silica plus non-ionic surfactant having a value of less than approximately 15.
Claim 3
Dependent Claim
14 words
A composition according to claim 1 wherein the polydimethylsiloxane fluid is emulsified in water.
Claim 4
Dependent Claim
15 words
A composition according to claim 2 wherein the colloidal silica is flocculated from aqueous suspension.
Claim 5
Dependent Claim
23 words
A composition according to claim 3 wherein the abrasive is a diatomaceous earth and is present in from 20 to 30 weight percent.
Claim 6
Dependent Claim
32 words
A composition according to claim 4 wherein the polydimethylsiloxane fluid has a viscosity of from 1 to 10 pascal-seconds at 25° C. and is present in from 3 to 6 weight percent.
Claim 7
Dependent Claim
11 words
A composition according to claim 5 wherein a thickener is present.
Claim 8
Dependent Claim
13 words
A composition according to claim 6 wherein the acid is a chelating acid.
Claim 9
Dependent Claim
12 words
A composition according to claim 7 wherein the acid is citric acid.
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) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |