US2879005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of refining scrap plastic and apparatus therefor
Assignee: Individual
•
Filing: 1954-12-29
•
Granted: 1959-03-24
•
Expires: 1974-12-29
Abstract
No abstract record available.
Inventors
- 👤 Edgar A Jarvis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:37
CPC Classifications
B; B29; B29B; B29B17/00; B29B17/04; B29B17/0404; B29B17/0408; B02; B02C; B02C19/00; B02C19/18; B02C19/186; B29B17/02; F; F25; F25D; F25D3/00; F25D3/10; F25D3/11; H; H01; H01B; H01B15/00; H01B15/001; B29B2017/0213; B29B2017/0217; B29B2017/0224; B29B2017/0234; B29B2017/0424; B29B2017/0492; B29K; B29K2021/00; B29K2023/00; B29K2023/04; B29K2023/06; B29K2025/00; B29K2027/00; B29K2027/06; B29K2105/00; B29K2105/06; B29K2105/065; B29K2705/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/52; Y02W30/62; Y02W30/82; Y10; Y10S; Y10S241/00; Y10S241/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A METHOD OF PURIFYING SCRAP PLASTIC MATERIAL BY REMORING SOLID IMPURITIES THEREFROM, INCLUDING THE STEPS OF CHOPPING THE MATERIAL INTO RELATIVELY COARSE DISCRETE PARTICLES; MOVING THE CHOPPED PARTICLES ALONG A GENERALLY ENCLOSED PATH WHILE INTRODUCING COLD FLUID REFRIGERANT TO LOWER THE TEMPERATURE OF THE PARTICLES TO BETWEEN ABOUT -120*F. AND ABOUT +10*F. SUFFICIENTLY LOW TO EMBRITTLE THE PLASTIC PORTION OF THE MATERIAL WHILE LEAVING ITS SOLID IMPURITIES SUBSTANTIALLY UNAFFECTED; THEREAFTER SUBJECTING THE COOLED MATERIAL TO HIGH SPEED PULVERIZING SO AS TO PULVERIZE THE EMBRITTLED PLASTIC WHILE LEAVING THE SOLID IMQURITIES FOR THE MOST PART UNPULVERIZED:
Claim 2
Independent Claim
95 words
A METHOD OF PURIFYING SCRAP PLASTIC MATERIAL BY REMORING SOLID IMPURITIES THEREFROM, INCLUDING THE STEPS OF CHOPPING THE MATERIAL INTO RELATIVELY COARSE DISCRETE PARTICLES; MOVING THE CHOPPED PARTICLES ALONG A GENERALLY ENCLOSED PATH WHILE INTRODUCING COLD FLUID REFRIGERANT TO LOWER THE TEMPERATURE OF THE PARTICLES TO BETWEEN ABOUT -120*F. AND ABOUT +10*F. SUFFICIENTLY LOW TO EMBRITTLE THE PLASTIC PORTION OF THE MATERIAL WHILE LEAVING ITS SOLID IMPURITIES SUBSTANTIALLY UNAFFECTED; THEREAFTER SUBJECTING THE COOLED MATERIAL TO HIGH SPEED PULVERIZING SO AS TO PULVERIZE THE EMBRITTLED PLASTIC WHILE LEAVING THE SOLID IMQURITIES FOR THE MOST PART UNPULVERIZED:
References Cited (Backward Citations)
US271138A
Cited
US448516A
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DE323351C
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US1978204A
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US2241654A
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US2316124A
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US2471043A
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US2609993A
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US2644740A
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US2609150A
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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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |