US5112665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water barrier of water-swellable clay sandwiched between interconnected layers of flexible fabric
Assignee: Amcol International Corp
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Filing: 1991-07-19
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Granted: 1992-05-12
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Expires: 2011-07-19
Abstract
Abstract A multi-layer article of manufacture includes an intermediate layer of a water-swellable colloidal clay, such as bentonite, sandwiched between two layers of flexible sheet or fabric material wherein the two flexible layers of sheet or fabric material are structurally interconnected through the intermediate clay layer, such as by quilting, with threads, fibers, filaments or strands of flexible material at spaced locations over essentially the entire outer surface areas of both sheet or fabric material layers.
Inventors
- 👤 William Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:32
CPC Classifications
E; E02; E02D; E02D31/00; E02D31/002; E02D31/004; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/911; Y10S210/912; Y10T; Y10T428/00; Y10T428/24; Y10T428/24033; Y10T428/24041; Y10T428/24479; Y10T428/24612; Y10T428/24777; Y10T428/24785; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/348
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
87 words
A multi-layer article of manufacture useful as a waterproofing material comprising a pair of flexible sheet material layers having a layer of a water-swellable clay sandwiched therebetween, said pair of sheet material layers structurally interconnected by sewing one to the other with continuous, elongated fabric-extraneous fibers at spaced intervals over essentially the entire major external surfaces of both sheet material layers to confine the clay therebetween, and further including a layer of flexible water-impermeable material substantially coextensive with and adhered to one of the sheet material layers.
Claim 2
Dependent Claim
87 words
A multi-layer article of manufacture useful as a waterproofing material comprising a pair of flexible sheet material layers having a layer of a water-swellable clay sandwiched therebetween, said pair of sheet material layers structurally interconnected by sewing one to the other with continuous, elongated fabric-extraneous fibers at spaced intervals over essentially the entire major external surfaces of both sheet material layers to confine the clay therebetween, and further including a layer of flexible water-impermeable material substantially coextensive with and adhered to one of the sheet material layers.
Claim 3
Dependent Claim
25 words
The article of claim 1 wherein the layer of water-impermeable material is a polymeric sheet material adhesively secured to the upper flexible sheet material layer.
Claim 4
Dependent Claim
27 words
The article of claim 1 wherein the layer of water-impermeable material is a mixture of a water-swellable clay and polypropene or polybutene as a cohesive, sticky layer.
Claim 5
Dependent Claim
16 words
The article of claim 1 wherein both of the sheet material layers are woven fabric layers.
References Cited (Backward Citations)
US3445322A
Cited
US4424248A
Cited
US4495235A
Cited
US4622260A
Cited
US4530765A
Cited
US4565468A
Cited
US4810573A
Cited
US4693923A
Cited
US4849273A
Cited
US4837085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-12 | 1995-11-11 | 1996-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-12 | 1999-11-11 | 2000-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-12 | 2003-11-11 | 2004-05-12 | $7700.00 | Window Closed / Lapsed |