Patent US1825899A successfully refreshed from Google Patents.
Patent US3768142A successfully refreshed from Google Patents.
US3768142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming a metal and foam plastic composite
Assignee: International Business Machines Corp
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Filing: 1971-12-20
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Granted: 1973-10-30
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Expires: 1991-12-20
Abstract
Abstract A method of fabricating a metal-clad polymeric part by shaping or forming the metal to the contour of the mold cavity and using heat expandable polymeric foam material to exert the necessary pressure to form the metal in one operation.
Inventors
- 👤 T Raczek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:43
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; B32B5/20; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/14; B29C44/16; B32B15/00; B32B15/04; B32B15/046; B32B15/20; B32B38/00; B32B2038/0052; B32B2038/0088; B32B2311/00; B32B2311/20; B32B2311/24; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
115 words
A method for producing a metal-clad polymeric composite which comprises: providing a mold having a surface formed complementary to the shape desired to be formed; placing a superplastic metal sheet of the type such as zinc-aluminum alloy adjacent said surface; providing a coating of thermoplastic adhesive on said metal sheet; filling said mold with a heat expandable ABS foaming material; and heating the mold at a temperature of at least 550* F. for at least 30 minutes to soften the superplastic sheet and to cause the foam material to expand and exert pressure against said adhesive coating and sheet whereby the foam material and metal sheet are bonded together and formed to the desired shape.
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |