US3795633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of thermoplastic foam
Assignee: Ford Motor Co
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Filing: 1971-12-17
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Granted: 1974-03-05
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Expires: 1991-12-17
Abstract
Abstract A METHOD FOR CONVERTING SCRAP THERMOPLASTIC FOAM TO USEFUL MATERIAL COMPRISES PARTICULARIZING SAID SCRAP, PASSING THE PARTICULATE SCRAP THROUGH A VENTED AND HEATED EXTRUDER TO WHICH A VACUUM OF BETWEEN 0 AND 140, PREFERABLY BETWEEN 5 AND ABOUT 50 MM. HG IS APPLIED TO YIELD A NON-POROUS, ESSENTIALLY VOID-FREE, SOLID RESIN. IN A PREFERRED EMBODIMENT, THE PARTICULARIZED SCRAP IS MIXED WITH ABOUT 5 TO ABOUT 50 WEIGHT PERCENT VIRGIN RESIN PELLETS PRIOR TO EXTRUSION.
Inventors
- 👤 A Golovoy
- 👤 R Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:28
CPC Classifications
B; B29; B29B; B29B17/00; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/76; B29C48/03; B29C48/04; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2105/00; B29K2105/04; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10S; Y10S264/00; Y10S264/911; Y10S264/916; Y10S521/00; Y10S521/918
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |