US3823047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacturing laminates of expanded thermoplastic resins
Assignee: LAVORAZIONE MAT PLAST
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Filing: 1972-07-26
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Granted: 1974-07-09
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Expires: 1992-07-26
Abstract
Abstract A thermoplastic resin foam web and a backing sheet and laminated by previously accumulating in the sheet an amount of heat at a temperature sufficient for heat-bonding by continuously passing the two through a lamination zone. The latter comprises a melting region for the web and sheet and a region in which the laminating pressure is continued under controlled temperature conditions preventing both dispersion of heat from the exposed face of the backing sheet and delivery of external heat capable of softening the cellular structure of the foam web.
Inventors
- 👤 R Colombo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:48
CPC Classifications
B; B32; B32B; B32B29/00; B32B29/002; B32B29/007; B29; B29C; B29C67/00; B29C67/20; B32B27/00; B32B5/00; B32B5/18; B32B2317/00; B32B2317/12; B32B2317/122; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1741; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249976
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |