Patent US6444864B1 successfully refreshed from Google Patents.
US6444864B1
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Thermal plasma process for recovering monomers and high value carbons from polymeric materials
Assignee: UNIVERSITY DREXEL
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Filing: 2000-06-07
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Granted: 2002-09-03
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Expires: 2020-06-07
Abstract
Abstract The present invention relates to a method of recycling polymeric waste products into monomers and high value forms of carbon by pyrolytic conversion using an induction coupled RF plasma heated reactor.
Inventors
- 👤 Richard Knight
- 👤 Elihu D. Grossmann
- 👤 Ravikishan R. Guddeti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:22
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/10; B; B82; B82Y; B82Y30/00; B82Y40/00; C01; C01B; C01B32/00; C01B32/15; C01B32/152; C01B32/154; C01B32/158; C01B32/16; Y; Y10; Y10S; Y10S977/00; Y10S977/84; Y10S977/842
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
72 words
A method of recycling polymeric materials into monomers and high value forms of carbon comprising: (a) injecting a powder of polymeric materials comprising polyethylene, polypropylene, polystyrene, polyethylene terepthalate, or polyvinyl chloride into an induction coupled RF plasma heated reactor so that the polymeric materials of the powder are pyrolytically converted to monomers and high value forms of carbons; and (b) isolating the monomers and high values forms of carbon from the reactor.
Claim 2
Independent Claim
72 words
A method of recycling polymeric materials into monomers and high value forms of carbon comprising: (a) injecting a powder of polymeric materials comprising polyethylene, polypropylene, polystyrene, polyethylene terepthalate, or polyvinyl chloride into an induction coupled RF plasma heated reactor so that the polymeric materials of the powder are pyrolytically converted to monomers and high value forms of carbons; and (b) isolating the monomers and high values forms of carbon from the reactor.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein the high value forms of carbon are Fullerenes.
Claim 4
Dependent Claim
10 words
The method of claim 2 wherein the Fullerenes are nanotubes.
References Cited (Backward Citations)
US5264640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-09-02 | 2006-03-04 | 2006-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-09-02 | 2010-03-04 | 2010-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-09-02 | 2014-03-04 | 2014-09-03 | $7700.00 | Window Closed / Lapsed |