US4205040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exposed aggregate finishing method for concrete
Assignee: Ohbayashi Gumi Ltd
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Filing: 1975-10-22
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Granted: 1980-05-27
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Expires: 1995-10-22
Abstract
Abstract An exposed aggregate finishing method for concrete. The method comprises coating the inside faces of a form for concrete with a cement setting retarder, drying, coating the dried faces with a synthetic organic polymer coating material which is soluble in an aqueous alkaline solution of cement, but is insoluble in water; and drying the coated faces. Alternatively, the method may be carried out by coating the inside faces of the form for concrete with the mixture of the cement setting retarder and the organic polymer coating material and drying the coated faces. Concrete is thereafter placed in the concrete form, the form removed and the surface of the molded concrete washed to make the surface rough.
Inventors
- 👤 Tsuyoshi Aoyama
- 👤 Yoshimasa Hayashi
- 👤 Hirotaka Toba
- 👤 Akira Yoshida
- 👤 Kenji Goto
- 👤 Motoaki Kawakama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:47
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/36; B28B7/362
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
126 words
An exposed aggregate finishing method for concrete which comprises coating the inside faces of a form for concrete with a mixture of a cement setting retarder and a synthetic organic polymer coating material which is soluble in an aqueous alkaline solution of cement, but insoluble in water, and drying the coated faces and then placing concrete into said concrete form, removing the form and washing the surface of the molded concrete to make the surface rough; the organic polymer being a copolymer of an organic compound having unsaturated groups selected from the group consisting of methyl methacrylate, vinyl acetate, vinyl chloride, ethylene, propylene and styrene, and an organic acid having unsaturated groups and selected from the group consisting of acrylic acid, crotonic acid and maleic acid.
Claim 2
Dependent Claim
126 words
An exposed aggregate finishing method for concrete which comprises coating the inside faces of a form for concrete with a mixture of a cement setting retarder and a synthetic organic polymer coating material which is soluble in an aqueous alkaline solution of cement, but insoluble in water, and drying the coated faces and then placing concrete into said concrete form, removing the form and washing the surface of the molded concrete to make the surface rough; the organic polymer being a copolymer of an organic compound having unsaturated groups selected from the group consisting of methyl methacrylate, vinyl acetate, vinyl chloride, ethylene, propylene and styrene, and an organic acid having unsaturated groups and selected from the group consisting of acrylic acid, crotonic acid and maleic acid.
Claim 3
Dependent Claim
130 words
An exposed aggregate finishing method for concrete which comprises coating the inside faces of a form for concrete with a cement setting retarder; drying; coating the said dried faces with a synthetic organic polymer coating material which is soluble in an aqueous alkaline solution of cement, but is insoluble in water; and drying the coated faces and then placing concrete into said concrete form, removing the form and washing the surface of the molded concrete to make the surface rough; the organic polymer being a copolymer of an organic compound having unsaturated groups selected from the group consisting of methyl methacrylate, vinyl acetate, vinyl chloride, ethylene, propylene and styrene, and an organic acid having unsaturated groups and selected from the group consisting of acrylic acid, crotonic acid and maleic acid.
Claim 4
Dependent Claim
130 words
An exposed aggregate finishing method for concrete which comprises coating the inside faces of a form for concrete with a cement setting retarder; drying; coating the said dried faces with a synthetic organic polymer coating material which is soluble in an aqueous alkaline solution of cement, but is insoluble in water; and drying the coated faces and then placing concrete into said concrete form, removing the form and washing the surface of the molded concrete to make the surface rough; the organic polymer being a copolymer of an organic compound having unsaturated groups selected from the group consisting of methyl methacrylate, vinyl acetate, vinyl chloride, ethylene, propylene and styrene, and an organic acid having unsaturated groups and selected from the group consisting of acrylic acid, crotonic acid and maleic acid.
Claim 5
Dependent Claim
15 words
The method of claim 2 wherein the organic polymer is a vinyl acetate/crotonic acid copolymer.
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) | 1983-05-27 | 1983-11-26 | 1984-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-27 | 1987-11-26 | 1988-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-27 | 1991-11-26 | 1992-05-27 | $7700.00 | Window Closed / Lapsed |