US4168924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic reinforcement of concrete
Assignee: Phillips Petroleum Co
•
Filing: 1977-07-28
•
Granted: 1979-09-25
•
Expires: 1997-07-28
Abstract
Abstract Reinforced concrete is prepared by embedding within it a reinforcing element of at least one rigid plastic gridwork (which is optionally filler reinforced) of integrally molded struts.
Inventors
- 👤 Homer L. Draper
- 👤 Duane W. Gagle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:30
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/16; E01C11/165; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31815
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
58 words
A process for producing reinforced asphaltic concrete comprising (a) pouring a first layer of an asphaltic concrete, (b) placing plastic gridwork made of integrally molded synthetic polymer struts in a geometric pattern onto the fresh unhardened top surface of said first layer of asphaltic concrete, and (c) covering said plastic gridwork with a second layer of asphaltic concrete.
Claim 2
Dependent Claim
58 words
A process for producing reinforced asphaltic concrete comprising (a) pouring a first layer of an asphaltic concrete, (b) placing plastic gridwork made of integrally molded synthetic polymer struts in a geometric pattern onto the fresh unhardened top surface of said first layer of asphaltic concrete, and (c) covering said plastic gridwork with a second layer of asphaltic concrete.
Claim 3
Dependent Claim
16 words
A process according to claim 1 wherein said geometric pattern is formed by regularly repeating units.
Claim 4
Dependent Claim
90 words
A process for producing reinforced concrete comprising (a) pouring a first layer of an asphaltic concrete, (b) placing plastic gridwork made of integrally molded synthetic polymer struts in a geometric pattern onto the fresh unhardened top surface of said first layer of asphaltic concrete, and (c) covering said plastic gridwork with a second layer of asphaltic concrete, wherein said geometric pattern is formed by regularly repeating units and wherein the cross sections of at least a portion of said integrally molded synthetic polymer struts of said platic gridwork are T-shaped.
Claim 5
Dependent Claim
90 words
A process for producing reinforced concrete comprising (a) pouring a first layer of an asphaltic concrete, (b) placing plastic gridwork made of integrally molded synthetic polymer struts in a geometric pattern onto the fresh unhardened top surface of said first layer of asphaltic concrete, and (c) covering said plastic gridwork with a second layer of asphaltic concrete, wherein said geometric pattern is formed by regularly repeating units and wherein the cross sections of at least a portion of said integrally molded synthetic polymer struts of said platic gridwork are T-shaped.
Claim 6
Dependent Claim
17 words
A process according to claim 3 wherein said regular geometric pattern is composed of regularly repeating triangles.
Claim 7
Dependent Claim
14 words
A process according to claim 4, wherein said plastic is reinforced with a filler.
Claim 8
Dependent Claim
11 words
A process according to claim 5 wherein said filler is fiberglass.
Claim 9
Dependent Claim
29 words
A process according to claim 6 wherein the weight percentage of said fiberglass filler to said unfilled asphaltic concrete is in the range of about 0 to about 20.
Claim 10
Dependent Claim
33 words
A process according to claim 1 wherein said concrete is at a temperature higher than the melting point of said plastic gridwork when said gridwork is placed on and covered with said concrete.
Claim 11
Dependent Claim
30 words
A process according to claim 8 wherein said plastic support grids are made of plastic having a coefficient of expansion equal to or greater than that of said asphaltic concrete.
Claim 12
Dependent Claim
13 words
A process according to claim 9 wherein said plastic is a high-density polyolefin.
Claim 13
Dependent Claim
13 words
A process according to claim 10 wherein said high-density polyolefin is high-density polyethylene.
Claim 14
Dependent Claim
24 words
A process according to claim 8 wherein said first layer and said second layer of said asphaltic concrete are of about the same composition.
Claim 15
Dependent Claim
23 words
A process according to claim 8 wherein said first layer and said second layer of said asphaltic concrete have about the same thickness.
Claim 16
Dependent Claim
15 words
A process according to claim 1 wherein said plastic gridwork is obtained by injection molding.
Claim 17
Dependent Claim
35 words
A process according to claim 8 wherein the temperature of said asphaltic concrete is within the range of about 275° F. to 310° F., when said gridwork is placed onto and covered with said concrete.
Claim 18
Dependent Claim
8 words
A reinforced concrete prepared according to claim 1.
Claim 19
Dependent Claim
32 words
A reinforced concrete prepared according to claim 1 wherein 2 or more of said gridworks lie in one plane and are joined together end to end to form one large plastic layer.
Claim 20
Dependent Claim
17 words
An asphaltic concrete according to claim 17 wherein said gridworks are joined with use of interlocking grooves.
Claim 21
Dependent Claim
15 words
An asphaltic concrete according to claim 17 wherein said gridworks are joined with heat fusing.
Claim 22
Dependent Claim
37 words
A reinforced asphaltic concrete wherein a plastic gridwork made of integrally molded synthetic polymer support struts in a geometric pattern is embedded at the interface between a top layer and a bottom layer of said asphaltic concrete.
Claim 23
Dependent Claim
37 words
A reinforced asphaltic concrete wherein a plastic gridwork made of integrally molded synthetic polymer support struts in a geometric pattern is embedded at the interface between a top layer and a bottom layer of said asphaltic concrete.
Claim 24
Dependent Claim
23 words
A reinforced asphaltic concrete according to claim 20 wherein at least a portion of said plastic support struts have a T-shaped cross section.
Claim 25
Dependent Claim
15 words
A reinforced asphaltic concrete according to claim 21 wherein said plastic is a high-density polyolefin.
Claim 26
Dependent Claim
14 words
A reinfored concrete according to claim 22 wherein said high-density polyolefin is high-density polyethylene.
Claim 27
Dependent Claim
20 words
A reinforced concrete according to claim 20 wherein said bottom layer and said top layer are of the same composition.
Claim 28
Dependent Claim
20 words
A reinforced concrete according to claim 20 wherein said bottom layer and said top layer have about the same thickness.
Claim 29
Dependent Claim
16 words
A reinforced concrete according to claim 20 wherein said plastic gridwork is obtained by injection molding.
Claim 30
Dependent Claim
37 words
A reinforced concrete according to claim 25 wherein the temperature of said asphaltic concrete is within the range from about 275° F. to about 310° F. when said gridwork is placed on and covered with said concrete.
Claim 31
Dependent Claim
40 words
A rectangular plastic reinforcing gridwork made of integrally molded synthetic polymer struts in a geometric pattern, wherein each of two adjacent sides of said gridwork has an upturned groove and each of the remaining two sides has a downturned groove.
Claim 32
Dependent Claim
40 words
A rectangular plastic reinforcing gridwork made of integrally molded synthetic polymer struts in a geometric pattern, wherein each of two adjacent sides of said gridwork has an upturned groove and each of the remaining two sides has a downturned groove.
Claim 33
Dependent Claim
17 words
A gridwork according to claim 28 wherein said geometric pattern is formed by regularly repeating geometric units.
Claim 34
Dependent Claim
69 words
A rectangular plastic reinforcing gridwork made of integrally molded synthetic polymer struts in a geometric pattern, wherein each of two adjacent sides of said gridwork has an upturned groove and each of the remaining two sides has a downturned groove, wherein said geometric pattern is formed by regularly repeating units and wherein the cross sections of at least a portion of said integrally molded synthetic polymer struts are T-shaped.
Claim 35
Dependent Claim
69 words
A rectangular plastic reinforcing gridwork made of integrally molded synthetic polymer struts in a geometric pattern, wherein each of two adjacent sides of said gridwork has an upturned groove and each of the remaining two sides has a downturned groove, wherein said geometric pattern is formed by regularly repeating units and wherein the cross sections of at least a portion of said integrally molded synthetic polymer struts are T-shaped.
Claim 36
Dependent Claim
14 words
A gridwork according to claim 30 wherein said plastic is reinforced with a filler.
Claim 37
Dependent Claim
14 words
A gridwork according to claim 31 wherein said plastic is a high density polyolefin.
Claim 38
Dependent Claim
24 words
A gridwork according to claim 32 wherein the thickness of said gridwork is in the range of about 0.25 in. to about 1.0 in.
Claim 39
Dependent Claim
19 words
A reinforcing structure wherein two or more gridworks according to claim 28 are joined with use of interlocking grooves.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |