US2818355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a conductive layer of graphite on an insulating substratum
Assignee: US Philips Corp
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Filing: 1955-11-21
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Granted: 1957-12-31
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Expires: 1975-11-21
Abstract
No abstract record available.
Inventors
- 👤 Hesemans Herman Peter Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:10
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THE METHOD OF APPLYING A COLLOIDAL GRAPHITE LAYER TO AN INSULATING SURFACE COMPRISING THE STEPS OF FORMING A MIXTURE OF AN ELECTROLYTE-STABILIZED SUSPENSION OF COLLOIDAL GRAPHITE IN WATER AS ONE COMPONENT AND SYNTHETIC RESIN AS ANOTHER COMPONENT OF SAID MIXTURE; APPLYING SAID MIXTURE TO SAID INSULATING SURFACE; HEATING SAID SURFACE TO DRY THE APPLIED MIXTURE; AND, AS SOON AS SAID MIXTURE IS DRY AND WHILE SAID SURFACE IS STILL WARM, WETTING THE DRIED LAYER WITH WATER HAVING A TEMPERATURE OF APPROXIMATELY 50*C. TO 80*C. FOR A PERIOD OF APPROXIMATELY TEN TO TWENTY SECONDS.
Claim 2
Independent Claim
93 words
THE METHOD OF APPLYING A COLLOIDAL GRAPHITE LAYER TO AN INSULATING SURFACE COMPRISING THE STEPS OF FORMING A MIXTURE OF AN ELECTROLYTE-STABILIZED SUSPENSION OF COLLOIDAL GRAPHITE IN WATER AS ONE COMPONENT AND SYNTHETIC RESIN AS ANOTHER COMPONENT OF SAID MIXTURE; APPLYING SAID MIXTURE TO SAID INSULATING SURFACE; HEATING SAID SURFACE TO DRY THE APPLIED MIXTURE; AND, AS SOON AS SAID MIXTURE IS DRY AND WHILE SAID SURFACE IS STILL WARM, WETTING THE DRIED LAYER WITH WATER HAVING A TEMPERATURE OF APPROXIMATELY 50*C. TO 80*C. FOR A PERIOD OF APPROXIMATELY TEN TO TWENTY SECONDS.
References Cited (Backward Citations)
US1981652A
Cited
US2496901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |