US3798103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminating incompatible polystyrene and vinyl chloride or acrylic plastic sheets
Assignee: Individual
•
Filing: 1972-02-25
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Granted: 1974-03-19
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Expires: 1992-02-25
Abstract
Abstract LAMINATING POLYSTYRENE SHEET AND A SYNTHETIC PLASTICS MATERIAL LINING SHEET WHICH IS HIGHLY IMPERMEABLE TO GASES AND IS INCOMPATIBLE WITH THE POLYSTYRENE, AND THERMOFORMING CONTANERS IN THE LAMINATE, REMOVING THEM FROM THE LAMINATE AND SEPARATING THE SKELETEL WASTES OF THE POLYSTYRENE AND LINING SHEET FOR RE-USE. THE SATISFACTORY BONDING BETWEEN THE POLYSTYRENE AND LINING SHEET IS ACHIEVED BY EXTRUDING ONE OR BOTH OF THE SHEETS AND BRING THE SHEETS TOGHETER UNDER PRESSURE AND COOLING WHILE THE OR EACH EXTRUDATE IS STILL SOFT. THE LINING SHEET IS SUITABLY POLYVINYL CHLORIDE, COPOLYMER OF POLYVINYL CHLORIDE OR HIGH BARRIER ACRYLIC THERMOPLASTIC MATERIAL. D R A W I N G
Inventors
- 👤 T Gaunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:10
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/02; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B29; B29C; B29C43/00; B29C43/22; B29C43/30; B29C43/305; B29C51/00; B29C51/14; B32B27/30; B32B27/302; B32B27/304; B29K; B29K2025/00; B29K2027/00; B29K2027/06; B32B2307/00; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2307/726; B32B2307/7265; B32B2325/00; B32B2327/00; B32B2327/06; B32B2439/00; B32B2439/70; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/108; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |