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Patent US5234723A successfully refreshed from Google Patents.
US5234723A
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Continous plasma activated species treatment process for particulate
Assignee: Polar Materials Inc
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Filing: 1990-10-05
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Granted: 1993-08-10
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Expires: 2010-10-05
Abstract
Abstract The present invention includes methods for treating particles with plasma activated species. Through the use of the present invention, particles can be functionalized, coated or grafted.
Inventors
- 👤 Robert J. Babacz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:46
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/16; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B29C; B29C59/00; B29C59/14; C; C08; C08F; C08F291/00; C08F292/00; C08J; C08J3/00; C08J3/28; C09; C09C; C09C3/00; C09C3/04; C09C3/048; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2004/62; C01P2004/80
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
56 words
A continuous process of treating particulate with a plasma activated species comprising the steps of: continuously providing at least one plasma activated species in a treatment zone maintained at sub-atmospheric pressure; continuously dropping a particulate through said treatment zone thereby treating said particulate with said at least one plasma activated species; and continuously recovering treated particulate.
Claim 2
Dependent Claim
56 words
A continuous process of treating particulate with a plasma activated species comprising the steps of: continuously providing at least one plasma activated species in a treatment zone maintained at sub-atmospheric pressure; continuously dropping a particulate through said treatment zone thereby treating said particulate with said at least one plasma activated species; and continuously recovering treated particulate.
Claim 3
Dependent Claim
31 words
The method of claim 1 further comprising the step of intermixing said particulate with at least one ionizable gas prior to the step of dropping said particulate through said treatment zone.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein said subatmospheric pressure maintained in said treatment zone ranges from about 0.01 to about 10.0 Torr.
Claim 5
Dependent Claim
22 words
The method of claim 3 wherein said subatmospheric pressure maintained in said treatment zone ranges from about 0.01 to about 1.0 Torr.
Claim 6
Dependent Claim
16 words
The method of claim 1 wherein said particulate is dropped substantially vertically through said treatment zone.
Claim 7
Dependent Claim
12 words
The method of claim 1 wherein said particulate is an inorganic material.
Claim 8
Dependent Claim
11 words
The method of claim 1 wherein said particulate is a polymer.
Claim 9
Dependent Claim
21 words
The method of claim 7, wherein said particulate is a polymer selected from the group consisting of polyolefins, polyesters and rubbers.
Claim 10
Dependent Claim
11 words
The method of claim 1 wherein said treated particulate is functionalized.
Claim 11
Dependent Claim
11 words
The method of claim 1 wherein said treated particulate is coated.
Claim 12
Independent Claim
10 words
The method of claim wherein said treated particulate is grafted.
Claim 13
Dependent Claim
42 words
The method of claim 1 further comprising the step of continuously conveying said particles from said treatment zone through a grafting zone and maintaining a grafting monomer vapor in said grafting zone, said vapor reacting with said particulate in said grafting zone.
Claim 14
Dependent Claim
33 words
The method of claim 12 wherein said step of continuously conveying said particulate through said grafting zone includes the step of continuously dropping said particulate from said treatment zone through said grafting zone.
References Cited (Backward Citations)
US4495044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-09 | 1997-02-08 | 1997-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-09 | 2001-02-08 | 2001-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-09 | 2005-02-08 | 2005-08-10 | $7700.00 | Window Closed / Lapsed |