US4344722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterproofing barrier
Assignee: Amcol International Corp
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Filing: 1981-01-19
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Granted: 1982-08-17
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Expires: 2001-01-19
Abstract
Abstract This invention provides a method and a system for waterproofing a desired substrate, and further contemplates, a waterproof and chemical-resistant product. The method provides providing a length of flexible moisture-permeable thin, synthetic sheet material having desired characteristics, placing in contact with the substrate to be waterproofed a layer of the material, covering the layer of material with a central layer of Montmorillonite clay and placing on top of the clay a third layer of the fabric.
Inventors
- 👤 Jules M. Blais
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:14
CPC Classifications
E; E02; E02D; E02D19/00; E02D19/06; E02D19/12; E02D19/18; C; C09; C09K; C09K17/00; E02D31/00; E02D31/002; E02D31/004
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
180 words
A method of constructing a waterproof surface adapted to be substantially impermeable to leaching of chemicals comprising providing a length of flexible moisture-permeable, thin, synthetic sheet material having an elongation of between 20% to about 100%, a water permeation rate of between 5 and 200 ml./sq.cm./sec. as measured under a water pressure of 35 cm., and a tensile strength of at least 200 Newtons as measured is a substantially dry state; placing in substantial contact with said surface a first or bottom layer of the material; forming a second or center layer of expandable Montmorillonite clay by water on top of said first layer so as to substantially cover said first layer or flexible material with the clay; and placing a third or top layer of the flexible fabric in juxtaposition with said clay layer so as to substantially cover and confine the clay layer within the two layers of fabric; the fabric being characterized in that it is a flexible material capable of adhesion with the outer surfaces of the clay layer when the clay layer has been activated.
Claim 2
Independent Claim
180 words
A method of constructing a waterproof surface adapted to be substantially impermeable to leaching of chemicals comprising providing a length of flexible moisture-permeable, thin, synthetic sheet material having an elongation of between 20% to about 100%, a water permeation rate of between 5 and 200 ml./sq.cm./sec. as measured under a water pressure of 35 cm., and a tensile strength of at least 200 Newtons as measured is a substantially dry state; placing in substantial contact with said surface a first or bottom layer of the material; forming a second or center layer of expandable Montmorillonite clay by water on top of said first layer so as to substantially cover said first layer or flexible material with the clay; and placing a third or top layer of the flexible fabric in juxtaposition with said clay layer so as to substantially cover and confine the clay layer within the two layers of fabric; the fabric being characterized in that it is a flexible material capable of adhesion with the outer surfaces of the clay layer when the clay layer has been activated.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein said clay is sodium bentonite.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein said clay is calcium bentonite.
Claim 5
Dependent Claim
38 words
The method of claim 1 including the further step of levelling and compacting the area to be waterproofed, prior to placing of the first or bottom layer of fabric thereon, so as to provide a substantially even surface.
Claim 6
Dependent Claim
24 words
The method of claim 1 including the further step of placing a fourth layer of protective material over said third layer of flexible fabric.
Claim 7
Dependent Claim
14 words
The method of claim 5 wherein said fourth layer comprises sand, stones or gravel.
Claim 8
Dependent Claim
23 words
The method of claim 1 or 5 including the further step of activating said clay through the application of water to said clay.
Claim 9
Dependent Claim
19 words
The method of claim 7 wherein said clay is activated by being in contact with water for 7 days.
Claim 10
Dependent Claim
19 words
The method of claim 1 wherein the average particle size of said clay ranges from 10 to 200 mesh.
Claim 11
Dependent Claim
19 words
The method of claim 1 wherein the average particle size of said clay ranges from 20 to 150 mesh.
Claim 12
Dependent Claim
16 words
The method of claim 1 wherein said the elongation of said flexible material ranges between 50-100%.
Claim 13
Dependent Claim
26 words
The method of claim 1 wherein the flexible material has a water permeation rate of 20-100 ml./sq.cm./sec. as measured under a water pressure of 35 cm.
Claim 14
Dependent Claim
26 words
The method of claim 1 wherein the flexible material has a water permeation rate of 20-60 ml./sq.cm./sec. as measured under a water pressure of 35 cm.
Claim 15
Dependent Claim
18 words
The method of claim 1 wherein the flexible material has a tensile strength of at least 250 Newtons.
Claim 16
Dependent Claim
18 words
The method of claim 1 wherein the flexible material has a tensile strength of at least 300 Newtons.
Claim 17
Dependent Claim
24 words
The method of claim 1 wherein said flexible material is a non-woven fabric ranging in thickness from 1/4 inch to 1/2 inch or more.
Claim 18
Dependent Claim
22 words
The method of claim 1 wherein said layer is applied in an amount of from 1/2 pound to 20 pounds or more.
Claim 19
Dependent Claim
19 words
The method of claim 1 wherein the edges of said layers are sealed by covering with soil or sand.
Claim 20
Dependent Claim
19 words
The method of claim 1 wherein said flexible material utilized is that marketed under the trademark "The Bento-Mat System".
Claim 21
Independent Claim
143 words
A system for waterproofing a desired area, said system comprising a first or bottom layer of flexible moisture-permeable thin synthetic sheet material having an elongation of between 20% to about 100%, a water permeation rate of 5 to 500 ml./sq.cm./sec. as measured under a water pressure of 35 cm., and a tensile strength of at least 200 Newtons as measured in a substantially dry state; a second or center layer of expandable montmorillonite clay actuatable in water lying on top of said first layer and substantially covering the first layer of flexible material; and a third or top layer of the flexible material in juxtaposition with the clay layer substantially covering the clay layer and confining the clay layer within the two layers of fabric, the fabric being characterized as being one capable of adhesion with the clay when the clay is activated.
Claim 22
Independent Claim
143 words
A system for waterproofing a desired area, said system comprising a first or bottom layer of flexible moisture-permeable thin synthetic sheet material having an elongation of between 20% to about 100%, a water permeation rate of 5 to 500 ml./sq.cm./sec. as measured under a water pressure of 35 cm., and a tensile strength of at least 200 Newtons as measured in a substantially dry state; a second or center layer of expandable montmorillonite clay actuatable in water lying on top of said first layer and substantially covering the first layer of flexible material; and a third or top layer of the flexible material in juxtaposition with the clay layer substantially covering the clay layer and confining the clay layer within the two layers of fabric, the fabric being characterized as being one capable of adhesion with the clay when the clay is activated.
Claim 23
Dependent Claim
13 words
A system as claimed in claim 20 wherein said clay is sodium bentonite.
Claim 24
Dependent Claim
13 words
A system aS claimed in claim 20 wherein said clay is calcium bentonite.
Claim 25
Dependent Claim
23 words
A system as claimed in claim 20 wherein there is provided a fourth layer of protective material over said third layer of flexible.
Claim 26
Dependent Claim
18 words
A system as claimed in claim 23 wherein said fourth layer is comprised of sand, stones or gravel.
Claim 27
Dependent Claim
21 words
A system as claimed in claim 20 wherein the average particle size of said clay ranges from 10 to 200 mesh.
Claim 28
Dependent Claim
21 words
A system as claimed in claim 20 wherein the average particle size of said clay ranges from 20 to 150 mesh.
Claim 29
Dependent Claim
17 words
A system as claimed in claim 20 wherein the elongation of said flexible material ranges between 50-100%.
Claim 30
Dependent Claim
28 words
A system as claimed in claim 20 wherein said flexible material has a water permeation rate of 20-100 ml./sq.cm./sec. as measured under a water pressure of 35 cm.
Claim 31
Dependent Claim
27 words
A system as claimed in claim 20 wherein said flexible material has a water permeation of 20-60 ml./sq.cm./sec. as measured under a water pressure of 35 cm.
Claim 32
Dependent Claim
20 words
A system as claimed in claim 20 wherein said flexible material has a tensile strength of at least 250 Newtons.
Claim 33
Dependent Claim
20 words
A system as claimed in claim 20 wherein said flexible material has a tensile strength of at least 300 Newtons.
Claim 34
Dependent Claim
26 words
A system as claimed in claim 20 wherein said flexible material is a non-woven fabric ranging in thickness from 1/4 inch to 1/2 inch or more.
Claim 35
Dependent Claim
25 words
A system as claimed in claim 20 wherein said clay layer is applied in an amount of from 1/2 pound to 20 pounds or more.
Claim 36
Dependent Claim
21 words
A system as claimed in claim 20 wherein said clay is activated by being in contact with water for 7 days.
Claim 37
Dependent Claim
22 words
A system as claimed in claim 20 wherein the edges of said layers are sealed by a layer of soil or sand.
Claim 38
Dependent Claim
20 words
A system as claimed in claim 20 wherein said flexible material is that marketed under the trademark "The Bento-Mat System".
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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) | 1985-08-16 | 1986-02-15 | 1986-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-16 | 1990-02-15 | 1990-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-16 | 1994-02-15 | 1994-08-17 | $7700.00 | Window Closed / Lapsed |