US5340618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for utilizing a plasma reaction under an atmospheric pressure
Assignee: Kimoto Co Ltd
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Filing: 1992-07-21
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Granted: 1994-08-23
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Expires: 2012-07-21
Abstract
Abstract A method is disclosed for the treatment of a powder by use of a plasma reactor under atmospheric pressure, comprising the steps of providing a reaction chamber having first and second electrodes covered with a dielectric, an upper gas exhaust means and a lower gas inlet means, feeding a fluidizing gas comprising a rare gas, a monomer gas or a mixture thereof through said gas inlet means into said chamber to agitate a powder to be treated in said chamber, concurrently removing said gas from said chamber through said gas exhaust means; and generating a glow plasma under atmospheric pressure in said chamber by applying a voltage to said first electrode and grounding said second electrode whereby said powder is provided with an anticorrosive surface treatment.
Inventors
- 👤 Tatsuzo Tanisaki
- 👤 Satiko Okazaki
- 👤 Masuhiro Kogoma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:00
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/62; B01; B01J; B01J19/00; B01J19/08; B01J19/087; B01J19/088; B01J8/00; B01J8/18; B01J8/24; B01J8/42; C; C04; C04B; C04B20/00; C04B20/02; C04B7/00; C04B7/36; C04B7/48; C09; C09B; C09B67/00; C09B67/0001; C09B67/0004; C09B67/0071; C09B67/0092; C09B67/0094; C09C; C09C3/00; C09C3/04; C09C3/048; B01J2219/00; B01J2219/08; B01J2219/0894; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
165 words
A method for the treatment of a powder by use of a plasma reactor under atmospheric pressure, comprising the steps of: providing a reaction chamber enclosing a first, spiral shaped electrode surrounding a second linear shaped electrode coaxial with the first electrode and said chamber, each electrode covered with a dielectric, an upper dispersing gas exhaust means and a lower dispersing gas inlet means; providing a third electrode around the periphery of and coaxial with said reaction chamber; feeding a dispersing gas selected from the group consisting of a rare gas, a monomer gas or a mixture thereof through said gas inlet means into said chamber to disperse a powder to be treated in said chamber; concurrently removing said gas from said chamber through said gas exhaust means; and, generating a glow plasma under the atmospheric pressure in said chamber by applying a voltage to said first electrode and grounding said second and third electrodes whereby said powder is provided with an anticorrosive surface treatment.
Claim 2
Independent Claim
165 words
A method for the treatment of a powder by use of a plasma reactor under atmospheric pressure, comprising the steps of: providing a reaction chamber enclosing a first, spiral shaped electrode surrounding a second linear shaped electrode coaxial with the first electrode and said chamber, each electrode covered with a dielectric, an upper dispersing gas exhaust means and a lower dispersing gas inlet means; providing a third electrode around the periphery of and coaxial with said reaction chamber; feeding a dispersing gas selected from the group consisting of a rare gas, a monomer gas or a mixture thereof through said gas inlet means into said chamber to disperse a powder to be treated in said chamber; concurrently removing said gas from said chamber through said gas exhaust means; and, generating a glow plasma under the atmospheric pressure in said chamber by applying a voltage to said first electrode and grounding said second and third electrodes whereby said powder is provided with an anticorrosive surface treatment.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein a solvent is fed into said reaction chamber together with said dispersing gas.
Claim 4
Dependent Claim
23 words
The method of claim 1 wherein an organic acid or an alkali gas is fed into said chamber together with said dispersing gas.
Claim 5
Dependent Claim
19 words
The method of claim 1 wherein an aerosol containing a surface active agent solution is fed into said chamber.
Claim 6
Dependent Claim
15 words
The method of claim 1 wherein said powder comprises a pigment, dye or cement powder.
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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) | 1997-08-22 | 1998-02-21 | 1998-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-22 | 2002-02-21 | 2002-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-22 | 2006-02-21 | 2006-08-23 | $7700.00 | Window Closed / Lapsed |