US2861961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark gap semi-conductor
Assignee: Bendix Aviation Corp
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Filing: 1957-07-24
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Granted: 1958-11-25
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Expires: 1977-07-24
Abstract
No abstract record available.
Inventors
- 👤 Robert C Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:10
CPC Classifications
H; H01; H01B; H01B1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A SPARK GAP SEMI-CONDUCTOR CONSISTING ESSENTIALLY OF 40-86% SILICON CARBIDE, 4-40% OF ONE OF THE GROUP CONSISTING OF COBALT OXIDE, MAGANESE OXIDE, AND MOLYBDENUM OXIDE, AND 10-40% OF A MIXTURE CONSISTING ESSENTIALLY OF A MAJOR PART OF ALUMINA, A MINOR PART OF 3CAO-5AL2O3, AND A TRACE OF SILICA, THE ALUMINA, 3CAO-5AL2O3, AND SILICA HAVING A WEIGHT RATIO WITH RESPECT TO EACH OTHER OF ABOUT 13:1.5:.3.
Claim 2
Dependent Claim
65 words
A SPARK GAP SEMI-CONDUCTOR CONSISTING ESSENTIALLY OF 40-86% SILICON CARBIDE, 4-40% OF ONE OF THE GROUP CONSISTING OF COBALT OXIDE, MAGANESE OXIDE, AND MOLYBDENUM OXIDE, AND 10-40% OF A MIXTURE CONSISTING ESSENTIALLY OF A MAJOR PART OF ALUMINA, A MINOR PART OF 3CAO-5AL2O3, AND A TRACE OF SILICA, THE ALUMINA, 3CAO-5AL2O3, AND SILICA HAVING A WEIGHT RATIO WITH RESPECT TO EACH OTHER OF ABOUT 13:1.5:.3.
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) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |