US3823211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic resin laminate and its manufacturing process
Assignee: LAVORAZIONE MAT PLAST
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Filing: 1971-12-13
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Granted: 1974-07-09
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Expires: 1991-12-13
Abstract
Abstract A SYNTHETIC RESIN LAMINATE COMPRISING A LAYER OF SYNTHETIC FOAM HEAT-SELAED TO A BIAXIALLY STRETCHED COVERING FILM OF SYNTHETIC RESIN. THE MANUFACTURING PROCESS COMPRISES SIMULTANEOUSLY COAXIALLY EXTRUDING A TUBULAR FILM EXTRUDATE AND A TUBULAR FOAM EXTRUDATE NOT CONTACTING EACH OTHER., THE FILM EXTRUDATE BEING EXTERNAL TO THE FOAM EXTRUDATE, AND AXIALLY DRAWING AND DIAMEETRICALLY DIFFERENTIALLY EXPANDING THE EXTRUDATE WHILE IN HEAT-SOFTENED STATE UNTIL THE FOAM EXTRUDATE LAMINATED ON THE INSIDE OF THE FILM EXTRUDATE.
Inventors
- 👤 R Colombo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:10
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/22; B32; B32B; B32B27/00; B32B27/06; B32B27/065; B29C48/00; B29C48/001; B29C48/0013; B29C48/0015; B29C48/03; B29C48/07; B29C48/08; B29C48/09; B29C48/10; B29C48/12; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/88; B29C48/90; B29C48/901; B29C48/902; B29C48/911; B29C48/9135; B29C48/914; B32B27/30; B32B27/302; B32B3/00; B32B3/26; B32B3/28; B32B38/00; B32B38/06; B32B5/00; B32B5/18; B60; B60C; B60C9/00; B60C9/0028; B29C48/0018; B29C48/0019; B29C48/13; B32B2038/0052; B32B2038/0084; B32B2038/0088; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0221; B32B2266/0228; B32B2307/00; B32B2307/30; B32B2307/304; B32B2307/31; B32B2307/50; B32B2307/514; B32B2307/518; B32B2355/00; B32B2355/02; B60C2200/00; B60C2200/02
Claims Analysis
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References Cited (Backward Citations)
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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) | 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 |