US4927668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment for automobile windshields
Assignee: Individual
•
Filing: 1988-08-01
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Granted: 1990-05-22
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Expires: 2008-08-01
Abstract
Abstract An anti-fogging and anti-wetting composition for coating at least one surface of an optically clear substrate, in particular, an automobile windshield, and comprising an isoparaffinic hydrocarbon solvent, an alkane selected from the group consisting of isobutane, N-butane, and propane, a hydrocarbon wax, and water. A process for treating the surface of an optically clear substrate with an anti-fogging and anti-wetting composition, which is applied from a pressurized container in aerosol form, to provide a transparent layer of wax on the surface of the substrate.
Inventors
- 👤 Patrick D. Senckowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:25
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/28; C09; C09K; C09K3/00; C09K3/18; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
136 words
The process of applying onto at least one surface of an optically clear substrate a compound which forms a transparent anti-fogging and anti-wetting layer from a valve actuated, pressurized container comprising the following steps: (a) actuating the valve, (b) directing the compound onto the surface of an optically clear substrate, and wherein said compound comprises: (1) 10 to 20% by weight of an isoparaffinic hydrocarbon solvent, (2) 10 to 20% by weight of an alkane selected from the group consisting of isobutane, N butane, and propane, (3) 5 to 15% by weight of a hydrocarbon wax, and (4) 60 to 70% by weight of water, and (c) buffing the substrate with a terry-type cloth to remove dirt and oils from the substrate and to provide a uniform and transparent layer of the compound on said surface.
Claim 2
Dependent Claim
136 words
The process of applying onto at least one surface of an optically clear substrate a compound which forms a transparent anti-fogging and anti-wetting layer from a valve actuated, pressurized container comprising the following steps: (a) actuating the valve, (b) directing the compound onto the surface of an optically clear substrate, and wherein said compound comprises: (1) 10 to 20% by weight of an isoparaffinic hydrocarbon solvent, (2) 10 to 20% by weight of an alkane selected from the group consisting of isobutane, N butane, and propane, (3) 5 to 15% by weight of a hydrocarbon wax, and (4) 60 to 70% by weight of water, and (c) buffing the substrate with a terry-type cloth to remove dirt and oils from the substrate and to provide a uniform and transparent layer of the compound on said surface.
Claim 3
Dependent Claim
13 words
The process as recited in claim 1, wherein said alkane is a propellant.
Claim 4
Dependent Claim
61 words
The process as recited in claim 1, wherein said solvent dissolves said wax into the compound solution to enable application of the compound onto the surface of an optically clear substrate, and where, upon evaporation of the solvent, said wax precipitates to form a layer on said surface, and wherein said solvent facilitates removal of dirt and oil from said surface.
Claim 5
Dependent Claim
25 words
The process as recited in claim 1 wherein said compound is manufactured under the trademark PLEDGE by S.C. Johnson & Son, Inc. of Racine Wisconsin.
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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) | 1993-05-21 | 1993-11-20 | 1994-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-21 | 1997-11-20 | 1998-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-21 | 2001-11-20 | 2002-05-22 | $7700.00 | Window Closed / Lapsed |