Patent US3645763A successfully refreshed from Google Patents.
US3645763A
Expired / Lapsed
US
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Composition for eliminating efflorescence in portland cement products
Assignee: Bio Organic Chemicals Inc
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Filing: 1970-04-15
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Granted: 1972-02-29
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Expires: 1990-04-15
Abstract
Abstract A composition comprising polyvinyl alcohol characterized by high-molecular weight and viscosity and very low solubility of insoluble in water, mixed with barium hydroxide or barium oxide, and added to Portland cement in the proportion ranging from 3/4 to 5 percent of the alcohol to 100 percent of the cement, effective to prevent bleeding of salts out of the cement and thereby markedly lessen or eliminate efflorescence in Portland cement products.
Inventors
- 👤 Anthony R Ronzio
- 👤 Bernard T Pull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:31
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
18 words
The composition defined by claim 1, in which the ingredients are combined by grinding in a ball mill.
Claim 2
Dependent Claim
56 words
A composition for substantially lessening or eliminating efflorescence in Portland cement products consisting essentially of Portland cement and the composition of claim 1, mixed together, in which the polyvinyl alcohol is combined with the Portland cement in proportions within the range of approximately 1/2 to 5 percent of the alcohol to 100 percent of the cement.
Claim 3
Dependent Claim
33 words
The composition defined by claim 3, in which the polyvinyl alcohol is combined with the Portland cement in the proportion of approximately 1 percent of the alcohol to 100 percent of the cement.
Claim 4
Dependent Claim
36 words
The composition defined by claim 3, in which the polyvinyl alcohol and the barium hydroxide or oxide when mixed together have a higher relative viscosity than the sum of the relative viscosities of said separate components.
Claim 5
Dependent Claim
36 words
The composition defined by claim 3, in which the Portland cement is in clinker form and the ingredients are combined by grinding the cement clinker with the alcohol and barium to pulverize the mixture before packaging.
Claim 6
Dependent Claim
35 words
The composition defined by claim 3, in which the Portland cement is in powder form, and the ingredients are combined by milling together in a ball mill, preparatory to mixing with water to produce concrete.
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |