Patent US4391870A successfully refreshed from Google Patents.
US4391870A
Expired / Lapsed
US
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Spray-suppression device
Assignee: Solutia Inc
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Filing: 1982-04-05
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Granted: 1983-07-05
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Expires: 2002-04-05
Abstract
Abstract A laminated, spray-suppression device having service properties over a wide range of use temperatures includes a non-woven nylon fabric core layer to inhibit stress cracks originating at low temperatures in an embrittled, grass-like low density polyethylene or polypropylene layer on one side of the core layer from propagating through to a high density polyethylene backing layer on the other side of the core layer.
Inventors
- 👤 Earle R. Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:43
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B32B7/00; B32B7/04; B32B7/12; B62; B62D; B62D25/00; B62D25/08; B62D25/16; B62D25/18; B32B2262/00; B32B2262/02; B32B2262/0261; B32B2323/00; B32B2323/04; B32B2323/043; B32B2323/046; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/24992; Y10T442/00; Y10T442/60; Y10T442/674; Y10T442/678
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
50 words
A laminated spray-suppression device comprising a non-woven polyamide fabric core layer encapsulated on each side with an adhesive layer, a backing layer of high density polyethylene fusion-bonded to one of the adhesive layers and a grass-like, three-dimensional layer of low density polyethylene or polypropylene fusion-bonded to the other adhesive layer.
Claim 2
Dependent Claim
50 words
A laminated spray-suppression device comprising a non-woven polyamide fabric core layer encapsulated on each side with an adhesive layer, a backing layer of high density polyethylene fusion-bonded to one of the adhesive layers and a grass-like, three-dimensional layer of low density polyethylene or polypropylene fusion-bonded to the other adhesive layer.
Claim 3
Dependent Claim
12 words
The device of claim 1 wherein the core layer comprises nylon 6,6.
Claim 4
Dependent Claim
17 words
The device of claim 1 wherein each adhesive layer comprises a copolymer of ethylene and vinyl acetate.
Claim 5
Dependent Claim
20 words
The device of claim 2 wherein the core layer has a nominal weight of about 1.5 ounces per square yard.
Claim 6
Dependent Claim
16 words
The device of claim 4 wherein the thickness of each adhesive layer is about 5 mils.
Claim 7
Independent Claim
18 words
The device of claims 1, 2, 3, 4 or 5 wherein the grass-like layer comprises low density polyethylene.
Claim 8
Independent Claim
102 words
A method of minimizing the tendency of a spray-suppression laminate which includes a grass-like layer of low density polyethylene or polypropylene and a backing layer of high density polyethylene to crack through its thickness on the application of stress at low temperature, said method comprising the step of incorporating a core layer into the laminate between said high density and grass-like layers for inhibiting crack-propagation from the grass-like layer to the high density polyethylene layer, said core layer comprising a non-woven nylon fabric encapsulated on each side with a thermoplastic adhesive layer melt bondable to said high density polyethylene and grass-like layers.
Claim 9
Independent Claim
102 words
A method of minimizing the tendency of a spray-suppression laminate which includes a grass-like layer of low density polyethylene or polypropylene and a backing layer of high density polyethylene to crack through its thickness on the application of stress at low temperature, said method comprising the step of incorporating a core layer into the laminate between said high density and grass-like layers for inhibiting crack-propagation from the grass-like layer to the high density polyethylene layer, said core layer comprising a non-woven nylon fabric encapsulated on each side with a thermoplastic adhesive layer melt bondable to said high density polyethylene and grass-like layers.
Claim 10
Dependent Claim
28 words
The process of claim 7 including the step of absorbing the thermoplastic adhesive into a predetermined portion of the thickness of the core layer before said incorporating step.
Claim 11
Dependent Claim
16 words
The process of claim 8 wherein the adhesive comprises a copolymer of ethylene and vinyl acetate.
Claim 12
Dependent Claim
16 words
The process of claims 7, 8 or 9 wherein the grass-like layer comprises low density polyethylene.
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) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |