US4043826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making artificial rocks
Assignee: Individual
•
Filing: 1974-11-22
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Granted: 1977-08-23
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Expires: 1994-11-22
Abstract
Abstract A light-weight simulated rock is made by molding a composition comprising cement, a light-weight filler, water, a curing agent for the cement and an acrylic resin latex in a flexible mold and thereafter nonuniformly coloring the hardened rock body so formed with cement dyes and/or pigments.
Inventors
- 👤 Bing W. Hum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:02
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; B; B44; B44F; B44F9/00; B44F9/04
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
131 words
A process for making light-weight simulated rock structures comprising molding an artificial rock molding composition comprising cement, a light-weight filler, water, a curing agent for the cement, and an acrylic resin latex paint in a mold having a nonuniform, grainy-textured molding surface to form a hardened rock body exhibiting a grainy surface resembling the surface of natural rock, said grainy surface defining cracks, indentations and concavities therein, removing the hardened rock body from the mold, applying to at least a portion of the grainy surface of the hardened rock body a coating of a cement colorant, and thereafter removing a portion of the coating of said cement colorant nonuniformly such that cement colorant preferentially resides in said cracks, identations and concavities, whereby a light-weight nonuniformly colored simulated rock structure is produced.
Claim 2
Dependent Claim
131 words
A process for making light-weight simulated rock structures comprising molding an artificial rock molding composition comprising cement, a light-weight filler, water, a curing agent for the cement, and an acrylic resin latex paint in a mold having a nonuniform, grainy-textured molding surface to form a hardened rock body exhibiting a grainy surface resembling the surface of natural rock, said grainy surface defining cracks, indentations and concavities therein, removing the hardened rock body from the mold, applying to at least a portion of the grainy surface of the hardened rock body a coating of a cement colorant, and thereafter removing a portion of the coating of said cement colorant nonuniformly such that cement colorant preferentially resides in said cracks, identations and concavities, whereby a light-weight nonuniformly colored simulated rock structure is produced.
Claim 3
Dependent Claim
76 words
The process of claim 1, wherein said artificial rock molding composition comprises: A. 1 part by volume ± 10 volume % of a cement, B. 1 part by volume ± 10 volume % of a light-weight filler, and C. at least 0.85 parts by volume of an aqueous binder composition comprising: 1. water, 2. a curing agent for said cement in an amount effective to cure the cement in said artificial rock molding composition, and 3.
Claim 4
Dependent Claim
12 words
an aqueous acrylic latex paint in an amount sufficient to provide about
Claim 5
Dependent Claim
12 words
an aqueous acrylic latex paint in an amount sufficient to provide about
Claim 6
Dependent Claim
33 words
5 to 2 volume % latex solids in said aqueous binder composition. 3. The process of claim 2, wherein said cement is Portland cement and further wherein said light-weight filler is horticultural perlite.
Claim 7
Dependent Claim
63 words
The process of claim 1, wherein said hardened rock body is colored by coating the surfaces of said hardened rock body with an aqueous dispersion or solution of said cement colorant to form a colorant coating layer on said hardened rock body and thereafter nonuniformly removing a portion of said coating layer to provide a simulated rock structure having a nonuniformly colored surface.
Claim 8
Dependent Claim
8 words
The product of the process of claim 1.
Claim 9
Dependent Claim
8 words
The product of the process of claim 2.
Claim 10
Dependent Claim
43 words
The process of claim 9 wherein said aqueous binder composition further contains (4) an aqueous acrylic latex, the total amount of acrylic solids from said acrylic latex paint (3) and said aqueous acrylic latex (4) being no more than about 20% by volume.
Claim 11
Dependent Claim
20 words
The process of claim 2, wherein the maximum amount of said aqueous binder composition is about 1.2 parts by volume.
Claim 12
Dependent Claim
20 words
The process of claim 1 further comprising coating said simulated rock structure with an aqueous dispersion of an acrylic latex.
Claim 13
Dependent Claim
41 words
The process of claim 4, wherein nonuniform removal of a portion of the coating layer is accomplished by rubbing whereby portions of said coating layer in said cracks, indentations and concavities remain while other portions of the coating layer are removed.
Claim 14
Dependent Claim
32 words
The process of claim 10, wherein said coating is rubbed five minutes to two hours after the surfaces of said hardened rock body have been coated with said aqueous dispersion or solution.
Claim 15
Dependent Claim
25 words
The process of claim 2, wherein the amount of aqueous binder composition in said artificial rock molding composition is 0.85 to 1.2 parts by volume.
Claim 16
Dependent Claim
63 words
The process of claim 12, wherein said hardened rock body is colored by coating the surfaces of said hardened rock body with an aqueous dispersion or solution of said cement colorant to form a colorant coating layer on said hardened rock body and thereafter nonuniformly removing a portion of said coating layer to provide a simulated rock structure having a nonuniformly colored surface.
Claim 17
Dependent Claim
41 words
The process of claim 13, wherein nonuniform removal of a portion of the coating layer is accomplished by rubbing whereby portions of said coating layer in said cracks, indentations and concavities remain while other portions of the coating layer are removed.
Claim 18
Dependent Claim
32 words
The process of claim 14, wherein said coating is rubbed five minutes to two hours after the surfaces of said hardened rock body have been coated with said aqueous dispersion or solution.
Claim 19
Dependent Claim
10 words
The process of claim 1, wherein said mold is flexible.
Claim 20
Dependent Claim
120 words
A process for making light-weight simulated rock structures comprising molding an artificial rock molding composition comprising cement, a light-weight filler, water, a curing agent for the cement, and an acrylic resin latex paint in a mold having a nonuniform, grainy-textured molding surface to form a hardened rock body exhibiting a grainy surface resembling the surface of natural rock, said grainy surface defining cracks, indentations and concavities therein, removing the hardened rock body from the mold, and applying to at least a portion of the surface of the hardened rock a cement colorant, said cement colorant being applied nonuniformly such that cement colorant preferentially resides in said cracks, indentations and concavities, whereby a light-weight nonuniformly colored simulated rock structure is produced.
Claim 21
Dependent Claim
120 words
A process for making light-weight simulated rock structures comprising molding an artificial rock molding composition comprising cement, a light-weight filler, water, a curing agent for the cement, and an acrylic resin latex paint in a mold having a nonuniform, grainy-textured molding surface to form a hardened rock body exhibiting a grainy surface resembling the surface of natural rock, said grainy surface defining cracks, indentations and concavities therein, removing the hardened rock body from the mold, and applying to at least a portion of the surface of the hardened rock a cement colorant, said cement colorant being applied nonuniformly such that cement colorant preferentially resides in said cracks, indentations and concavities, whereby a light-weight nonuniformly colored simulated rock structure is produced.
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) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |