US2617745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing an electroconductive article
Assignee: PPG Industries Inc
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Filing: 1951-12-19
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Granted: 1952-11-11
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Expires: 1971-12-19
Abstract
No abstract record available.
Inventors
- 👤 Richard F Raymond
- 👤 Brook J Dennison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:04
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/3411; C03C17/3417
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A METHOD OF PROVIDING A SUBSTANTIALLY HAZEFREE GLASS BASE HAVING A TRANSPARENT ELECTROCONDUCTIVE COATING THEREON, WHICH COMPRISES CONTACTING A GLASS BASE WHICH HAS THE COMPOSITION. PER CENT BY WEIGHT ALKALI METAL OXIDE OF THE GROUP CONSISTING OF NA2O AND K2O 10 TO 35 ALKALINE EARTH METAL OXIDE OF THE GROUP CONSISTING OF CAO AND MGO 5 TO 25-THE CAO CONTENT BEING NOT LESS THAN 5 PER CENT BY WEIGHT SIO 50 TO 75 AL2OS UP TO 20 WITH A SOLUTION OF SILICON HALIDE, PERMITTING THE GLASS TO DRY WHEREBY TO FORM A TRANSPARENT SILICA FILM ON SAID BASE AND A POWDER DEPOSIT ON SAID FILM COMPRISING AN EXCESS OF SILICA, REMOVING THE POWDER DEPOSIT, HEATING SAID GLASS TO A TEMPERATURE ABOVE ABOUT 400* F., BUT BELOW THE TEMPERATURE AT WHICH THE GLASS MELTS, AND CONTACTING THE HOT GLASS WITH STANNIC CHLORIDE WHEREBY TO DEPOSIT A TRANSPARENT ELECTROCONDUCTIVE TIN OXIDE COAT ING UPON A TREATED SURFACE OF THE GLASS.
Claim 2
Independent Claim
158 words
A METHOD OF PROVIDING A SUBSTANTIALLY HAZEFREE GLASS BASE HAVING A TRANSPARENT ELECTROCONDUCTIVE COATING THEREON, WHICH COMPRISES CONTACTING A GLASS BASE WHICH HAS THE COMPOSITION. PER CENT BY WEIGHT ALKALI METAL OXIDE OF THE GROUP CONSISTING OF NA2O AND K2O 10 TO 35 ALKALINE EARTH METAL OXIDE OF THE GROUP CONSISTING OF CAO AND MGO 5 TO 25-THE CAO CONTENT BEING NOT LESS THAN 5 PER CENT BY WEIGHT SIO 50 TO 75 AL2OS UP TO 20 WITH A SOLUTION OF SILICON HALIDE, PERMITTING THE GLASS TO DRY WHEREBY TO FORM A TRANSPARENT SILICA FILM ON SAID BASE AND A POWDER DEPOSIT ON SAID FILM COMPRISING AN EXCESS OF SILICA, REMOVING THE POWDER DEPOSIT, HEATING SAID GLASS TO A TEMPERATURE ABOVE ABOUT 400* F., BUT BELOW THE TEMPERATURE AT WHICH THE GLASS MELTS, AND CONTACTING THE HOT GLASS WITH STANNIC CHLORIDE WHEREBY TO DEPOSIT A TRANSPARENT ELECTROCONDUCTIVE TIN OXIDE COAT ING UPON A TREATED SURFACE OF THE GLASS.
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) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |