US3561956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance alloys
Assignee: Johnson Matthey PLC
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Filing: 1968-05-10
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Granted: 1971-02-09
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Expires: 1988-05-10
Abstract
Abstract RESISTANCE ALLOYS MADE ACCORDING TO THIS INVENTION HAVE HIGH ELECTRICAL RESISTIVITY AND ARE SUITABLE FOR MAKING RESISTANCE WIRE HAVING HIGH AND CONSTANT ELECTRICAL RESISTANCE. THE ALLOYS ARE PRIMARILY PALLADIUM/VANDIUM ALLOYS AND INCLUDE 0.5 TO 11% BY WEIGHT OF ONE OR MORE OF THE ELEMENTS GOLD, MOLYBDENUM OR ALUMINUM.
Inventors
- 👤 John Jephson Norreys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:17
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/02; C; C22; C22C; C22C5/00
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |