Patent US3573229A successfully refreshed from Google Patents.
US3573229A
Expired / Lapsed
US
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Cermet resistor composition and method of making same
Assignee: Alloys Unlimited Inc
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Filing: 1968-01-30
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Granted: 1971-03-30
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Expires: 1988-01-30
Abstract
Abstract THE FIELD OF CERMET RESISTORS IS REVIEWED, PROBLEMS ASSOCIATED THEREWITH ARE DISCUSSED, AND THE EFFORTS OF CERTAIN PRIOR WORKERS ARE SUMMARIZED. AN IMPROVED RESISTANCE COMPOSITION IS DESCRIBED EMPLOYING, AS THE CONDUCTIVE FRACTION, A MIXTURE OF GOLD, SILVER OR PLATINUM WITH THE OXIDE OF IRIDIUM OR RUTHENIUM. RESISTORS ARE PRODUCED HAVING EXCELLENT NOISE, TCR AND OTHER PROPERTIES AT RESISTANCES OF UP TO 10 MEGOHMS PER SQUARE, AND IN NO INSTANCE IS FRIT CONTENT HIGHER THAN ABOUT 78%. THE METHOD OF PRODUCING THESE RESISTORS IN A READILY REPRODUCIBLE MANNER IS DETAILED, AND THEIR PROPERTIES ARE ILLUSTRATED.
Inventors
- 👤 Darwyn L Herbst
- 👤 William L Dawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:50
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06513; H01C17/06533; H01C17/0654; H01C17/06553
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |