US4968463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making molded or extruded objects from waste containing plastic materials
Assignee: OTV Omnium de Traitements et de Valorisation SA
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Filing: 1989-04-05
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Granted: 1990-11-06
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Expires: 2009-04-05
Abstract
Abstract A process is provided for producing extruded or molded objects from waste containing plastic materials. The process includes the following steps: preliminary physical treatment, optional drying, preheating to a temperature of from 80° to 160° C., mixing at a temperature of from 120°-250° C., and injection molding or extrustion.
Inventors
- 👤 Jean-Pierre Levasseur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:10
CPC Classifications
B; B29; B29B; B29B17/00; B29B17/0026; B29B17/0042; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/395; B29C48/78; B29C48/86; B29C48/865; B29C48/88; B29C48/911; B29C45/00; B29C48/03; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10S; Y10S264/00; Y10S264/911; Y10S264/92; Y10S264/921
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
96 words
A process for making extruded or molded objects from waste containing primarily a mixture of thermoplastic materials, comprising: preliminary physical processing of said waste; determining the water content of said waste and if the water content is above about 8% by weight, drying said waste materials to a water content of not more than about 8% by weight; preheating said waste to a temperature of from 80 to 160° C.; kneading said waste at a temperature of from 120 to 250° C.; and molding said waste by injection molding or extrusion to form a final product.
Claim 2
Dependent Claim
96 words
A process for making extruded or molded objects from waste containing primarily a mixture of thermoplastic materials, comprising: preliminary physical processing of said waste; determining the water content of said waste and if the water content is above about 8% by weight, drying said waste materials to a water content of not more than about 8% by weight; preheating said waste to a temperature of from 80 to 160° C.; kneading said waste at a temperature of from 120 to 250° C.; and molding said waste by injection molding or extrusion to form a final product.
Claim 3
Dependent Claim
19 words
The process according to claim 1 wherein said final product contains at least 65% by weight of thermoplastic materials.
Claim 4
Dependent Claim
16 words
The process according to claim 1 wherein, after said waste are dried, filler materials are added.
Claim 5
Dependent Claim
16 words
The process according to claim 1 wherein, after said waste are dried, coloring materials are added.
Claim 6
Dependent Claim
16 words
The process according to claim 3 wherein, after said waste are dried, coloring materials are added.
Claim 7
Dependent Claim
15 words
The process according to claim 3 wherein said filler materials are composed of waste products.
Claim 8
Dependent Claim
22 words
The process according to claim 1 wherein said preliminary physical treatment comprises shredding said waste to a granulometry of approximately 100 mm.
Claim 9
Dependent Claim
17 words
The process according to claim 1 wherein said preliminary physical treatment comprises removing metals from said waste.
Claim 10
Dependent Claim
20 words
The process according to claim 1 wherein said preliminary physical treatment comprises grinding to a granulometry under approximately 40 mm.
Claim 11
Dependent Claim
18 words
The process according to claim 7 wherein said preliminary physical treatment further includes removing metals from said waste.
Claim 12
Dependent Claim
23 words
The process according to claim 8 wherein said preliminary physical treatment further includes grinding said waste to a granulometry under approximately 40 mm.
Claim 13
Dependent Claim
21 words
The process according to claim 1 wherein, before said preheating stage, the waste is granulated and stored temporarily before continuing processing.
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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) | 1993-11-05 | 1994-05-07 | 1994-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-05 | 1998-05-07 | 1998-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-05 | 2002-05-07 | 2002-11-06 | $7700.00 | Window Closed / Lapsed |