US3717307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing regrind
Assignee: Individual
•
Filing: 1971-01-27
•
Granted: 1973-02-20
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Expires: 1991-01-27
Abstract
Abstract A method of preparing injection-molding, blow-molding and extrusion-molding residues, wastes and used thermoplastic materials for further forming which involves the comminution of the plastic simultaneously with the washing thereof, to remove soil, in a washing liquid.
Inventors
- 👤 E Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:53
CPC Classifications
B; B02; B02C; B02C18/00; B02C18/06; B02C18/08; B02C18/086; B02C23/00; B02C23/18; B26; B26D; B26D1/00; B26D1/01; B26D1/12; B26D1/25; B26D1/34; B26D1/38; B29; B29B; B29B17/00; B29B17/02; B29B17/04; B29B2017/0424; B29B2017/048; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2023/10; B29K2023/12; B29K2025/00; B29K2027/00; B29K2027/06; B29K2105/00; B29K2105/06; B29K2105/065; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
49 words
A method of reclaiming scrap thermoplastic material, comprising the steps of comminuting scrap thermoplastic material in a washing liquid tO clean the scrap material simultaneously with the subdivision thereof; draining said liquid from the subdivided material; and centrifuging the subdivided material to separate the subdivided material from residual liquid.
Claim 2
Dependent Claim
18 words
The method defined in claim 1, further comprising the steps of drying and granulating the centrifuged subdivided material.
Claim 3
Dependent Claim
11 words
The method defined in claim 2 wherein the liquid is water.
Claim 4
Dependent Claim
13 words
The method defined in claim 3 wherein said liquid contains a surface-active agent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |