US4753679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cement products containing surface treated inorganic particulates
Assignee: HARCROS PIGMENTS Inc C/O HARRISONS & CROSFIELD (AMERICA) Inc
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Filing: 1986-06-11
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Granted: 1988-06-28
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Expires: 2006-06-11
Abstract
Abstract Particulate calcium carbonate or iron oxide pretreated with a fatty acid such as stearic acid or oleic acid is added to a cementitious product to improve its strength and resistance to water absorption and penetration. Dry, aqueous and nonaqueous methods of addition are employed.
Inventors
- 👤 John Damiano
- 👤 Alan H. Bruder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:40
CPC Classifications
C; C04; C04B; C04B20/00; C04B28/00; C04B28/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
36 words
A cementitious composition, which comprises a cement and a particulate inorganic substrate previously surface treated to completely coat the substrate with a fatty acid in the amount of from about 0.2 to 20 grams/100 grams substrate.
Claim 2
Dependent Claim
36 words
A cementitious composition, which comprises a cement and a particulate inorganic substrate previously surface treated to completely coat the substrate with a fatty acid in the amount of from about 0.2 to 20 grams/100 grams substrate.
Claim 3
Dependent Claim
15 words
The composition of claim 1 wherein the inorganic substrate is calcium carbonate or iron oxide.
Claim 4
Dependent Claim
15 words
The composition of claim 1 wherein the fatty acid is oleic acid or stearic acid.
Claim 5
Dependent Claim
26 words
The composition of claim 1 wherein the treated inorganic substrate is present in an amount of from about 0.2 to 30 weight percent of the cement.
Claim 6
Dependent Claim
28 words
The composition of claim 4 wherein the cement is present in the amount of from about 5 to 30 weight percent of the total solids of the composition.
Claim 7
Dependent Claim
21 words
The composition of claim 1 wherein the average particle size of the inorganic substrate is from about 0.02 to 20 microns.
Claim 8
Independent Claim
74 words
A method of preparing a cementitious product, which comprises the steps of: surface treating a particulate inorganic substrate with a fatty acid in the amount of from about 0.2 to 20 grams fatty acid/100 grams substrate to completely coat the inorganic substrate with the fatty acid; adding the treated inorganic substrate and particulate cement to a particulate base concrete formulation; blending the resulting mixture; adding water; and allowing the resulting wet blend to set.
Claim 9
Independent Claim
74 words
A method of preparing a cementitious product, which comprises the steps of: surface treating a particulate inorganic substrate with a fatty acid in the amount of from about 0.2 to 20 grams fatty acid/100 grams substrate to completely coat the inorganic substrate with the fatty acid; adding the treated inorganic substrate and particulate cement to a particulate base concrete formulation; blending the resulting mixture; adding water; and allowing the resulting wet blend to set.
Claim 10
Dependent Claim
23 words
The method of claim 7 wherein the cement and the treated inorganic substrate are blended prior to addition to the base concrete formulation.
Claim 11
Dependent Claim
22 words
The method of claim 7 wherein the treated inorganic substrate is added as a slurry in an aqueous or polar organic medium.
Claim 12
Dependent Claim
16 words
The method of claim 7 wherein particulate inorganic colorant is added to the base concrete formulation.
Claim 13
Dependent Claim
21 words
The method of claim 10 wherein the treated inorganic substrate and the inorganic colorant are added together as an aqueous slurry.
References Cited (Backward Citations)
US2003613A
Cited
US3720529A
Cited
US3720528A
Cited
US4278576A
Cited
JPS5595657A
Cited
JPS57100180A
Cited
US4375987A
Cited
US4444921A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-28 | 1991-12-28 | 1992-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-28 | 1995-12-28 | 1996-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-28 | 1999-12-28 | 2000-06-28 | $7700.00 | Window Closed / Lapsed |