US3751534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of laminar cellular articles
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1971-04-08
•
Granted: 1973-08-07
•
Expires: 1991-04-08
Abstract
Abstract PRODUCING A LAMINATE HAVING A CELLULAR CORE AND AN UNFOAMED SURFACE SKIN BY INJECTING A NON-FOAMABLE THERMOPLASTIC COMPOSITION AND THEN A FOAMABLE THERMOPLASTIC COMPOSITION INTO A MOULD AND RETAINING THE MATERIALS WITHIN THE MOULD AND THEREAFTER ENLARGING THE MOULD AND ALLOWING THE FOAMABLE COMPOSITION TO FOAM.
Inventors
- 👤 D Oxley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:24
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/04; B29C44/0461; C; C08; C08J; C08J9/00; C08J9/34; B29C45/00; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S264/83
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |