US3679607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxide resistor materials
Assignee: Huntington Alloys Corp
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Filing: 1967-10-19
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Granted: 1972-07-25
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Expires: 1987-10-19
Abstract
Abstract RESISTORS MADE FROM COMPOSITIONS COMPRISING RUTHENIUM AND/OR IRIDIUM DIOXIDES WITH FINE CRYSTALLITE SIZE ARE CHARACTERIZED BY LOW NOISE LEVELS AND LOW VALUES OF TEMPERATURE COEFFICIENT OF RESISTIVITY.
Inventors
- 👤 Hamish Carmichael Angus
- 👤 Peter Edward Gainsbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:10
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06513; H01C17/06533; H01C17/0654
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |