US4285827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsified film forming polymer and methylene chloride/water paint stripper
Assignee: Hamer R J Ltd
•
Filing: 1979-08-16
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Granted: 1981-08-25
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Expires: 1999-08-16
Abstract
Abstract A method of making a paint stripper comprising mixing a water soluble cellulose gum e.g. hydroxy ethyl cellulose or ethyl cellulose, with water and with a film forming polymer e.g. an acrylic polymer, vinyl acrylic polymer, or vinyl acetate polymer, vinyl acetate copolymer, and adding to the resulting emulsion a mixture of methylene chloride and a cellulose gum which is soluble therein, e.g. ethyl cellulose or hydroxy propyl cellulose. The invention is from another aspect a paint stripper comprising methylene chloride emulsified in the presence of a film forming polymer.
Inventors
- 👤 Sidney G. Wyatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:12
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/005; C09; C09D; C09D9/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
46 words
A paint stripper comprising an aqueous emulsion of methylene chloride, a film forming polymer selected from the group consisting of acrylic polymers, vinyl acrylic polymers, vinyl acetate polymers, and vinyl acetate copolymers, a cellulose gum soluble in the methylene chloride and a water soluble cellulose gum.
Claim 2
Dependent Claim
46 words
A paint stripper comprising an aqueous emulsion of methylene chloride, a film forming polymer selected from the group consisting of acrylic polymers, vinyl acrylic polymers, vinyl acetate polymers, and vinyl acetate copolymers, a cellulose gum soluble in the methylene chloride and a water soluble cellulose gum.
Claim 3
Dependent Claim
25 words
A paint stripper according to claim 1, wherein the water soluble cellulose gum is selected from the group consisting of hydroxy cellulose and methyl cellulose.
Claim 4
Dependent Claim
28 words
A paint stripper according to claim 1, wherein the cellulose gum soluble in methylene chloride is selected from the group consisting of ethyl cellulose and hydroxy propyl cellulose.
Claim 5
Independent Claim
62 words
A method of making a paint stripper comprising mixing a water soluble cellulose gum with water and with a film forming polymer selected from the group consisting of acrylic polymers, vinyl acrylic polymers, vinyl acetate polymers and vinyl acetate copolymers to form an emulsion, and adding to the emulsion a mixture of methylene chloride and a cellulose gum which is soluble therein.
Claim 6
Independent Claim
62 words
A method of making a paint stripper comprising mixing a water soluble cellulose gum with water and with a film forming polymer selected from the group consisting of acrylic polymers, vinyl acrylic polymers, vinyl acetate polymers and vinyl acetate copolymers to form an emulsion, and adding to the emulsion a mixture of methylene chloride and a cellulose gum which is soluble therein.
Claim 7
Dependent Claim
30 words
A method of making a paint stripper according to claim 4, wherein the water soluble cellulose gum is selected from the group consisting of hydroxy methyl cellulose and methyl cellulose.
Claim 8
Dependent Claim
33 words
A method of making a paint stripper according to claim 4, in which the cellulose gum soluble in methylene chloride is selected from the group consisting of ethyl cellulose and hydroxy propyl cellulose.
References Cited (Backward Citations)
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Cited
US2705207A
Cited
US3574123A
Cited
US3600322A
Cited
US3702304A
Cited
US4120810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |