Patent US4606938A successfully refreshed from Google Patents.
US4606938A
Expired / Lapsed
US
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Concrete treatment methods
Assignee: Individual
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Filing: 1984-05-24
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Granted: 1986-08-19
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Expires: 2004-05-24
Abstract
Abstract A method for treating and cleaning stained concrete surface which involves applying a phosphoric acid-containing solution to said surface and drying same.
Inventors
- 👤 Thomas L. Reiling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:37
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5076; C04B41/5092; C04B41/60; C04B41/61; C04B41/65; C04B41/67; C04B2111/00; C04B2111/00474; C04B2111/0075
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
A method of treating a stained concrete surface whereby said surface is treated and cleaned by creation of a pigment and said pigment is bonded to said surface as a covering therefor in a single operation, said method comprising: completely wetting said surface with an excess of a treating solution containing, by weight, about one part of a pigment binder, one part phosphoric acid, and from eight to thirty parts of water; permitting said phosphoric acid to react with the staining material on said stained surface to create a substantially white-colored water-insoluble pigment; and permitting said solution to dry in place while said binder becomes effective to bond the pigment created by reaction between said stain causing materials and said phosphoric acid.
Claim 2
Independent Claim
122 words
A method of treating a stained concrete surface whereby said surface is treated and cleaned by creation of a pigment and said pigment is bonded to said surface as a covering therefor in a single operation, said method comprising: completely wetting said surface with an excess of a treating solution containing, by weight, about one part of a pigment binder, one part phosphoric acid, and from eight to thirty parts of water; permitting said phosphoric acid to react with the staining material on said stained surface to create a substantially white-colored water-insoluble pigment; and permitting said solution to dry in place while said binder becomes effective to bond the pigment created by reaction between said stain causing materials and said phosphoric acid.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said pigment binder comprises a starch gel.
Claim 4
Dependent Claim
21 words
The method of claim 1 wherein said solution further includes from about 0.05 to about 0.2 parts of oxalic acid dihydrate.
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) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |