US4117065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming conductive carbon-plastic material
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1977-05-02
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Granted: 1978-09-26
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Expires: 1997-05-02
Abstract
Abstract A method of forming a conductive carbon-plastic material having increased surface area and enhanced surface conductivity characteristics is described. A conductive carbon-plastic material is molded from a mixture containing particulate conductive carbon and plastic material. The surface of the resulting conductive carbon-plastic material is simultaneously abraded and embedded with carbon particles by the projection of a dry mixture of compacted carbon and metal particles against the surface by means of propulsion. This dry mixture of compacted carbon and metal particles is obtained by ball milling a mixture of specified amounts and sizes of carbon and metal particles. Zinc metal particles are preferred.
Inventors
- 👤 Hsue C. Tsien
- 👤 Agustin F. Venero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:16
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; C; C04; C04B; C04B26/00; C04B26/02; C04B41/00; C04B41/45; C04B41/50; C04B41/5001; C04B41/53; H01M; H01M4/00; H01M4/02; H01M4/64; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
178 words
A method of forming a conductive carbon-plastic material having enhanced surface conductivity characteristics, comprising: (a) molding a conductive carbon-plastic material from a mixture containing about 10% to about 50% particulate conductive carbon and about 90% to about 50% plastic material, based on the total weight of the particulate conductive carbon and plastic material, said carbon having a particle size within the range of about 10 millimicrons to about 100 microns; (b) forming a dry mixture of compacted carbon and metal particles by ball milling a mixture containing about 5% to about 30% of conductive carbon having a particle size of about 5 millimicrons to about 50 millimicrons and about 95% to about 70% of metal particles having a particle size of about 10 microns to about 200 microns based on the total weight of the carbon and metal particles; and (c) simultaneously abrading the surface of said conductive carbon-plastic material and embedding carbon particles therein by projecting against said surface said dry mixture of compacted carbon and metal particles at a pressure of at least about 50 psig.
Claim 2
Independent Claim
178 words
A method of forming a conductive carbon-plastic material having enhanced surface conductivity characteristics, comprising: (a) molding a conductive carbon-plastic material from a mixture containing about 10% to about 50% particulate conductive carbon and about 90% to about 50% plastic material, based on the total weight of the particulate conductive carbon and plastic material, said carbon having a particle size within the range of about 10 millimicrons to about 100 microns; (b) forming a dry mixture of compacted carbon and metal particles by ball milling a mixture containing about 5% to about 30% of conductive carbon having a particle size of about 5 millimicrons to about 50 millimicrons and about 95% to about 70% of metal particles having a particle size of about 10 microns to about 200 microns based on the total weight of the carbon and metal particles; and (c) simultaneously abrading the surface of said conductive carbon-plastic material and embedding carbon particles therein by projecting against said surface said dry mixture of compacted carbon and metal particles at a pressure of at least about 50 psig.
Claim 3
Dependent Claim
28 words
The method of claim 1 wherein, in step (a), said mixture contains about 15% to about 25% particulate conductive carbon and about 85% to about 75% plastic material.
Claim 4
Dependent Claim
25 words
The method of claim 2 wherein the particulate conductive carbon of step (a) has a particle size of about 10 millimicrons to about 100 millimicrons.
Claim 5
Dependent Claim
27 words
The method of claim 2 wherein, in step (c), said dry mixture is projected against said surface at a pressure of about 50 to about 150 psig.
Claim 6
Dependent Claim
53 words
The method of claim 4, wherein, in step (b), the mixture contains about 10% to about 20% of conductive carbon having a particle size of about 10 millimicrons to about 20 millimicrons and about 90% to about 80% of metal particles having a particle size of about 20 microns to about 150 microns.
Claim 7
Dependent Claim
12 words
The method of claim 5 wherein said metal particles are zinc particles.
Claim 8
Dependent Claim
28 words
The method of claim 5 wherein, in step (a), said mixture contains about 20% to about 25% particulate conductive carbon and about 80% to about 75% plastic material.
Claim 9
Dependent Claim
25 words
The method of claim 7 wherein the particulate conductive carbon of step (a) has a particle size of about 20 millimicrons to about 40 millimicrons.
Claim 10
Dependent Claim
27 words
The method of claim 7 wherein, in step (c), said dry mixture is projected against said surface at a pressure of about 90 to about 130 psig.
Claim 11
Dependent Claim
41 words
The method of claim 9 wherein, in step (b), the mixture contains conductive carbon having a particle size of about 15 millimicrons to about 20 millimicrons and metal particles having a particle size of about 50 microns to about 100 microns.
Claim 12
Dependent Claim
12 words
The method of claim 10 wherein said metal particles are zinc particles.
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) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |