US4002790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Postformable laminate
Assignee: General Electric Co
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Filing: 1974-09-06
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Granted: 1977-01-11
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Expires: 1994-09-06
Abstract
Abstract The postformability of laminates particularly decorative laminates, having resin-impregnated paper layers is improved by resin treating at least one of the core layers near the surface of the laminate to render the fibers therein less yielding than those of the other layers.
Inventors
- 👤 Carl E. Trewiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:42
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/02; B32B7/022; B32B29/00; B32B29/002; B32B29/005; B44; B44C; B44C5/00; B44C5/04; B44C5/0469; D; D21; D21H; D21H27/00; D21H27/18; D21H27/22; D21H27/26; D21H5/00; D21H5/0085; D21H5/0087; B32B2317/00; B32B2317/12; B32B2317/125; B32B2451/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043; Y10T156/1044; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/24992; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31964; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
A decorative plastic laminate, characterized by improved postformability render heat, comprising a plurality of paper core sheets, all of said core sheets being resin-impregnated, and an overlying print sheet, at least one of said core sheets next to the print sheet of said laminate, but not all of said core sheets, being specially resin-impregnated to a greater resin content than the other resin-impregnated core sheets to render the fibers in said specially resin-impregnated core sheets less yielding to postforming stresses relative to those of the other resin-impregnated core sheets to reduce failure of the surface of said laminate when said laminate is postformed.
Claim 2
Dependent Claim
103 words
A decorative plastic laminate, characterized by improved postformability render heat, comprising a plurality of paper core sheets, all of said core sheets being resin-impregnated, and an overlying print sheet, at least one of said core sheets next to the print sheet of said laminate, but not all of said core sheets, being specially resin-impregnated to a greater resin content than the other resin-impregnated core sheets to render the fibers in said specially resin-impregnated core sheets less yielding to postforming stresses relative to those of the other resin-impregnated core sheets to reduce failure of the surface of said laminate when said laminate is postformed.
Claim 3
Dependent Claim
22 words
A laminate as in claim 1 which has a plurality of core sheets and an overlying resin-impregnated print sheet and protective overlayer.
Claim 4
Dependent Claim
22 words
A laminate as in claim 1 wherein more than one of the core sheets next to the print sheet are specially resin-impregnated.
Claim 5
Dependent Claim
21 words
A laminate as in claim 1 wherein the specially resin-impregnated two core sheets next to the print sheet are specially resin-impregnated.
Claim 6
Dependent Claim
81 words
The process of providing readily heat postformable decorative plastic laminates comprising a plurality of resin-impregnated paper core sheets all of which are resin-impregnated and a superimposed print sheet thereon which comprises resin-impregnating at least one of the core sheets next to the print sheet, but not all of said core sheets, to a greater resin content than the other resin-impregnated core sheets to render said specially resin-impregnated core sheet less yielding than the other core sheets when said laminate is postformed.
Claim 7
Dependent Claim
81 words
The process of providing readily heat postformable decorative plastic laminates comprising a plurality of resin-impregnated paper core sheets all of which are resin-impregnated and a superimposed print sheet thereon which comprises resin-impregnating at least one of the core sheets next to the print sheet, but not all of said core sheets, to a greater resin content than the other resin-impregnated core sheets to render said specially resin-impregnated core sheet less yielding than the other core sheets when said laminate is postformed.
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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) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |