US2803566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating articles with heatresistant electrically conducting compositions
Assignee: S-J Chemical Co
•
Filing: 1953-04-28
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Granted: 1957-08-20
•
Expires: 1973-04-28
Abstract
No abstract record available.
Inventors
- 👤 Smith-Johannsen Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:51
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/24; H; H01; H01B; H01B1/00; H01B1/14; H01B1/18; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099; Y10T428/00; Y10T428/25; Y10T428/259
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
THE METHOD OF COATING AN INSULATING SURFACE WITH A POROUS ELECTRICALLY CONDUCTIVE COMPOSITION WHICH COMPRISES APPLYING TO THE SURFACE A COMPOSITION COMPRISING PARTICLES OF GRAPHITE DISPERSED THRTOUGHOUT AN AQUEOUS ALKALI-COLLOIDOL SILICA IN THE FORM OF DISPERSED PARTICLES HAVING AN ULTIMATE PARTICLE SIZE OF LESS THAN 30 MILLIMICRONS, A SILICA-ALKALI RATIO OF FROM ABOUT 60:1 TO 130:1, AN AVERAGE MOLECULAR WEIGHT, AS DETERMINED BY LIGHT SCATTERING, O MORE THAN ONE-HALF MILLION, AND I WHICH THE ALKALU IS SUBSTANTIALLY ALL OUTSIDE THE SILICA PARTICLES AND ALLOWING THE COMPOSITION TO DRY AND ADHERE TO THE INSULATING SURFACE.
Claim 2
Independent Claim
94 words
THE METHOD OF COATING AN INSULATING SURFACE WITH A POROUS ELECTRICALLY CONDUCTIVE COMPOSITION WHICH COMPRISES APPLYING TO THE SURFACE A COMPOSITION COMPRISING PARTICLES OF GRAPHITE DISPERSED THRTOUGHOUT AN AQUEOUS ALKALI-COLLOIDOL SILICA IN THE FORM OF DISPERSED PARTICLES HAVING AN ULTIMATE PARTICLE SIZE OF LESS THAN 30 MILLIMICRONS, A SILICA-ALKALI RATIO OF FROM ABOUT 60:1 TO 130:1, AN AVERAGE MOLECULAR WEIGHT, AS DETERMINED BY LIGHT SCATTERING, O MORE THAN ONE-HALF MILLION, AND I WHICH THE ALKALU IS SUBSTANTIALLY ALL OUTSIDE THE SILICA PARTICLES AND ALLOWING THE COMPOSITION TO DRY AND ADHERE TO THE INSULATING SURFACE.
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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) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |