US3948614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite metal sheetings
Assignee: Bennes Marrel SA
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Filing: 1972-12-06
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Granted: 1976-04-06
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Expires: 1992-12-06
Abstract
Abstract A composite metal sheet is formed by two metal sheets, each having a plain face and a face having raised portions. The faces having the raised portions are juxtaposed to each other and swelled. The metal sheets may also be flat on both surfaces with a metal spacer welded therebetwee. A plastic filler is also contemplated.
Inventors
- 👤 Fernand Michalon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:25
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/02; B32; B32B; B32B15/00; B32B15/04; B32B15/046; B23; B23K; B23K11/00; B23K11/002; B23K11/0026; B23K11/0093; B23K11/14; B32B15/08; B32B5/00; B32B5/14; B32B5/145; B32B5/18; B32B5/20; B32B2607/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/2419; Y10T428/24198; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/24999; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A composite sheet comprising first and second flat imperforate sheets, a plurality of elongated parallel omega-shaped channel members being disposed between said first and second sheet in contact therewith and connecting means for securing said channel members to said first and second sheets, said composite sheet further comprising a plate of cellular material secured to the uppermost surface of one of said sheets and a metal sheet secured to said sheet of cellular material.
Claim 2
Dependent Claim
74 words
A composite sheet comprising first and second flat imperforate sheets, a plurality of elongated parallel omega-shaped channel members being disposed between said first and second sheet in contact therewith and connecting means for securing said channel members to said first and second sheets, said composite sheet further comprising a plate of cellular material secured to the uppermost surface of one of said sheets and a metal sheet secured to said sheet of cellular material.
References Cited (Backward Citations)
US2391997A
Cited
US3072225A
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US3011602A
Cited
US3273976A
Cited
US3507634A
Cited
US3373480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |