Patent US4586962A successfully refreshed from Google Patents.
US4586962A
Expired / Lapsed
US
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Surface cleaning process
Assignee: ISP Investments LLC
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Filing: 1984-05-10
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Granted: 1986-05-06
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Expires: 2004-05-10
Abstract
Abstract Particulate contaminant is removed from surfaces by applying a coating of an aqueous solution of copolymer of maleic acid and monomer. The particulate contaminant becomes incorporated into the coating during drying and the coating detaches itself from the surface without the necessity of peeling or otherwise mechanically removing the contaminant laden coating.
Inventors
- 👤 Eugene S. Barabas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:30
CPC Classifications
B; B08; B08B; B08B7/00; B08B7/0014; C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3769; C11D3/3776; C23; C23G; C23G1/00; C23G1/02; C23G1/025
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
94 words
Process for removing particulate contaminant from a surface contaminated with such contaminant by means other than chemical reaction between material of the surface and chemicals of the environment, which process comprises: (a) applying to such contaminated surface a layer of surface cleaning composition consisting essentially of an aqueous solution or dispersion of water soluble or water dispersible copolymer of maleic acid and vinylpyrrolidone monomer; and (b) allowing said layer of cleaning composition to dry whereby particulate contaminant becomes incorporated into said layer and the layer containing the particulate contaminant detaches itself from the surface.
Claim 2
Dependent Claim
94 words
Process for removing particulate contaminant from a surface contaminated with such contaminant by means other than chemical reaction between material of the surface and chemicals of the environment, which process comprises: (a) applying to such contaminated surface a layer of surface cleaning composition consisting essentially of an aqueous solution or dispersion of water soluble or water dispersible copolymer of maleic acid and vinylpyrrolidone monomer; and (b) allowing said layer of cleaning composition to dry whereby particulate contaminant becomes incorporated into said layer and the layer containing the particulate contaminant detaches itself from the surface.
Claim 3
Dependent Claim
29 words
Process according to claim 1 wherein the coating composition contains between about 5 and about 60 wt % copolymer and between about 40 and about 95 wt % water.
Claim 4
Dependent Claim
19 words
Process according to claim 1 wherein the coating composition has a viscosity between about 50 and about 250,000 cps.
Claim 5
Dependent Claim
25 words
Process according to claim 1 wherein the coating composition is applied to the surface in a layer between about 0.01 and about 20 mm thick.
Claim 6
Dependent Claim
24 words
Process according to claim 1 wherein the layer of applied coating composition is allowed to dry for between about 0.5 and about 8 hours.
Claim 7
Dependent Claim
84 words
Process according to claim 1 wherein: (a) the coating composition contains between about 5 and about 60 wt % copolymer and between about 50 and about 95 wt % water; (b) the coating composition has a viscosity between about 50 and about 250,000 cps; (c) the coating composition is applied to the surface in a layer between about 0.01 and about 20 mm thick; and (d) the layer of applied coating composition is allowed to dry for between about 0.5 and about 8 hours.
Claim 8
Dependent Claim
12 words
Process according to claim 1 wherein the particulate contaminant includes radioactive particles.
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) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |