Patent US2740731A successfully refreshed from Google Patents.
US2740731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroconductive article and production thereof
Assignee: PPG Industries Inc
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Filing: 1951-01-20
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Granted: 1956-04-03
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Expires: 1971-01-20
Abstract
No abstract record available.
Inventors
- 👤 William O Lytle
- 👤 Albert E Junge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:33
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/215; C03C2217/24; C03C2217/241; C03C2218/00; C03C2218/10; C03C2218/11; C03C2218/112; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
50 words
A METHOD OF PROVIDING A REFRACTORY BASE WITH AN ELECTROCONDUCTIVE COATING WHICH COMPRISES HEATING THE BASE TO A TEMPERATURE ABOVE ABOUT 400* F. BUT BELOW THE TEMPERATURE AT WHICH THE BASE BECOMES MOLTEN, AND APPLYING TO THE HOT BASE A FLUID DISPERSION OF AN INDIUM SALT AND AN IONIZABLE FLUORIDE.
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) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |