US4622075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal cleaning
Assignee: Qo Chemicals Inc
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Filing: 1985-11-12
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Granted: 1986-11-11
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Expires: 2005-11-12
Abstract
Abstract A process for cleaning a metal, plastic or wood surface on which there is a residue resulting from contact with a cured resin which comprises applying to said surface a solution of a copolymer of N-vinyl-2-pyrrolidone and maleic acid, drying said solution of N-vinyl-2-pyrrolidone and maleic acid to form a film, and separating said film from the metal surface.
Inventors
- 👤 Ben R. Bogner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:18
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3769; C11D3/3776; B; B08; B08B; B08B7/00; B08B7/0014; B22; B22C; B22C7/00; Y; Y10; Y10T; Y10T156/00; Y10T156/11; Y10T156/1111; Y10T156/1116
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
A process for cleaning a metal, plastic or wood surface on which there is a build-up of a residue resulting from curing of a resin while said resin is in contact with said surface which comprises: applying to said metal, plastic or wood surface a solution of a copolymer of N-vinyl-2-pyrrolidone and maleic acid, drying said solution of N-vinyl-2-pyrrolidone and maleic acid to form a film, and separating said film together with said residue from the metal, plastic or wood surface.
Claim 2
Dependent Claim
81 words
A process for cleaning a metal, plastic or wood surface on which there is a build-up of a residue resulting from curing of a resin while said resin is in contact with said surface which comprises: applying to said metal, plastic or wood surface a solution of a copolymer of N-vinyl-2-pyrrolidone and maleic acid, drying said solution of N-vinyl-2-pyrrolidone and maleic acid to form a film, and separating said film together with said residue from the metal, plastic or wood surface.
Claim 3
Dependent Claim
66 words
A process in accordance with claim 1 wherein the build-up of residue results from curing while in contact with said surface a resin binder for sand cores or molds selected from the group consisting of furan no-bake binders, phenolic no-bake binders, phenolic urethane-amine binders, phenolic hot box binders, furan hot box binders, furan-sulfur dioxide binders, acrylic-sulfur dioxide binders, epoxy acrylic-sulfur dioxide binders and alkyd oil binders.
Claim 4
Dependent Claim
78 words
A process for cleaning a foundry pattern element on which there is a build-up of a residue resulting from curing a sand binder resin while said resin is in contact with the foundry pattern element which comprises: applying to said foundry pattern element a solution of a copolymer of N-vinyl-2-pyrrolidone and maleic acid, drying said solution of N-vinyl-2-pyrrolidone and maleic acid to form a film, and separating said film together with said residue from the foundry pattern element.
Claim 5
Dependent Claim
78 words
A process for cleaning a foundry pattern element on which there is a build-up of a residue resulting from curing a sand binder resin while said resin is in contact with the foundry pattern element which comprises: applying to said foundry pattern element a solution of a copolymer of N-vinyl-2-pyrrolidone and maleic acid, drying said solution of N-vinyl-2-pyrrolidone and maleic acid to form a film, and separating said film together with said residue from the foundry pattern element.
Claim 6
Dependent Claim
31 words
A process in accordance with claim 3 wherein the build-up of residue results from curing a furan or phenolic-urethane sand binder resin while the resin is in contact with said surface.
Claim 7
Dependent Claim
44 words
A process in accordance with claim 3 for cleaning a foundry pattern element on which there is a build-up of a residue resulting from curing a mixture of sand and a binder therefor while said mixture is in contact with the foundry pattern element.
Claim 8
Dependent Claim
18 words
A process in accordance with claim 3 wherein the foundry pattern element is a metal foundry pattern element.
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) | 1989-11-10 | 1990-05-12 | 1990-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-10 | 1994-05-12 | 1994-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-10 | 1998-05-12 | 1998-11-11 | $7700.00 | Window Closed / Lapsed |