US3179544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically conductive coated article with stable electrical resistance and method for producing same
Assignee: Chemelex Inc
•
Filing: 1962-05-02
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Granted: 1965-04-20
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Expires: 1982-05-02
Abstract
No abstract record available.
Inventors
- 👤 Smith-Johannsen Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:15
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/14; H01B1/18; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06573; H01C17/0658; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/1092; Y10T156/1093; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T428/00; Y10T428/25; Y10T428/259; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
THE METHOD OF PRODUCING AN ELECTRICALLY CONDUCTIVE COATED ARTICLE IN WHICH THE ELECTRICAL RESISTANCE IS STABLE IN THE PRESENCE OF MOISTURE WHICH COMPRISES THE STEPS OF: (A) APPLYING TO AN INSULATING BASE AN ELECTRICALLY CONSION OF ELECTRICALLY CONDUCTIVE PARTICLES, CONSISTING ESSENTIALLY OF GRAPHITE PARTICLES, IN AN AMOUNT SUFFICIENT TO RENDER THE COMPOSITION ELECTRICALLY CONDUCTIVE WHEN DRY AND A NON-CONDUCTIVE STABILIZED COLLOIDAL SILICA IN THE FORM OF DISPERSED PARTICLES HAVING SUBSTANTIALLY NO ALKALI WITHIN THE SILICA PARTICLES AND A SILICA-ALKALI RATIO EXPRESSED AS NA2O OF AT LEAST 10:1, (B) DRYING THE ELECTRICALLY CONDUCTIVE COATING, (C) HEATING THE ELECTRICALLY CONDUCTIVE COATING TO A TEMPERATURE OF AT LEAST 312*F. AND FOR A LENGTH OF TIME SUFFICIENT TO STABILIZE SAID COATING AGAINST PERMANENT ALTERATION OF ITS ELECTRICAL RESISTANCE DUE TO VARIATIONS IN THE MOISTURE CONTENT THEREOF OCCURRING SUBSEQUENT TO SAID DRYING, (D) APPLYING ELECTRODES AT SPACED POINTS ON SAID COATING, AND (E) ADHERING A SHEET OF INSULATING MATERIAL OVER SAID COATING AND ELECTRODES WITH AN AQUEOUS ALKALI ADHESIVE.
Claim 2
Independent Claim
164 words
THE METHOD OF PRODUCING AN ELECTRICALLY CONDUCTIVE COATED ARTICLE IN WHICH THE ELECTRICAL RESISTANCE IS STABLE IN THE PRESENCE OF MOISTURE WHICH COMPRISES THE STEPS OF: (A) APPLYING TO AN INSULATING BASE AN ELECTRICALLY CONSION OF ELECTRICALLY CONDUCTIVE PARTICLES, CONSISTING ESSENTIALLY OF GRAPHITE PARTICLES, IN AN AMOUNT SUFFICIENT TO RENDER THE COMPOSITION ELECTRICALLY CONDUCTIVE WHEN DRY AND A NON-CONDUCTIVE STABILIZED COLLOIDAL SILICA IN THE FORM OF DISPERSED PARTICLES HAVING SUBSTANTIALLY NO ALKALI WITHIN THE SILICA PARTICLES AND A SILICA-ALKALI RATIO EXPRESSED AS NA2O OF AT LEAST 10:1, (B) DRYING THE ELECTRICALLY CONDUCTIVE COATING, (C) HEATING THE ELECTRICALLY CONDUCTIVE COATING TO A TEMPERATURE OF AT LEAST 312*F. AND FOR A LENGTH OF TIME SUFFICIENT TO STABILIZE SAID COATING AGAINST PERMANENT ALTERATION OF ITS ELECTRICAL RESISTANCE DUE TO VARIATIONS IN THE MOISTURE CONTENT THEREOF OCCURRING SUBSEQUENT TO SAID DRYING, (D) APPLYING ELECTRODES AT SPACED POINTS ON SAID COATING, AND (E) ADHERING A SHEET OF INSULATING MATERIAL OVER SAID COATING AND ELECTRODES WITH AN AQUEOUS ALKALI ADHESIVE.
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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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |