US2797175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic electrical insulator having a semi-conducting glaze coating
Assignee: General Electric Co
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Filing: 1955-05-26
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Granted: 1957-06-25
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Expires: 1975-05-26
Abstract
No abstract record available.
Inventors
- 👤 Paul B Horton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:39
CPC Classifications
H; H01; H01B; H01B19/00; C; C03; C03C; C03C8/00; C03C8/14; C03C8/20; H01B1/00; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A CERAMIC ELECTRICAL INSULATOR BODY HAVING A SEMICONDUCTING GLAZE COATING THEREON, SAID COATING CONSISTING ESSENTIALLY OF A MIXTURE OF FERRIC OXIDE, TITANIUM DIOXIDE, CHROMIC OXIDE, AND NOT MORE THAN ABOUT 70% BY WEIGHT OF GLASS FORMING MATERIALS, A SUBSTANTIAL PORTION OF SAID CHROMIC OXIDE BEING PRESENT IN SAID MIXTURE AS AN INTENTIONALLY ADDED INGREDIENT AND OTHER THAN AN IMPURITY, SAID COATING HAVING A THICKNESS OF NOT LESS THAN ABOUT 3 MILS, AND THE TOTAL WEIGHT OF SAID FERRIC OXIDE, TITANIUM DIOXIDE, AND CHROMIC OXIDE COMPRISING ABOUT 30 TO 98% FERRIC OXIDE, ABOUT 0.80 TO 50% TITANIUM DIOXIDE, AND ABOUT 1.2 TO 40% CHROMIC OXIDE.
Claim 2
Dependent Claim
104 words
A CERAMIC ELECTRICAL INSULATOR BODY HAVING A SEMICONDUCTING GLAZE COATING THEREON, SAID COATING CONSISTING ESSENTIALLY OF A MIXTURE OF FERRIC OXIDE, TITANIUM DIOXIDE, CHROMIC OXIDE, AND NOT MORE THAN ABOUT 70% BY WEIGHT OF GLASS FORMING MATERIALS, A SUBSTANTIAL PORTION OF SAID CHROMIC OXIDE BEING PRESENT IN SAID MIXTURE AS AN INTENTIONALLY ADDED INGREDIENT AND OTHER THAN AN IMPURITY, SAID COATING HAVING A THICKNESS OF NOT LESS THAN ABOUT 3 MILS, AND THE TOTAL WEIGHT OF SAID FERRIC OXIDE, TITANIUM DIOXIDE, AND CHROMIC OXIDE COMPRISING ABOUT 30 TO 98% FERRIC OXIDE, ABOUT 0.80 TO 50% TITANIUM DIOXIDE, AND ABOUT 1.2 TO 40% CHROMIC OXIDE.
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) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |