US3705796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact material
Assignee: Fujitsu Ltd
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Filing: 1970-09-24
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Granted: 1972-12-12
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Expires: 1990-09-24
Abstract
Abstract SILVER-ZINC SOLID SOLUTION ALLOYS USED FOR CONTACT MATERIALS HAVE THE DISADVANTAGE THAT THEY FORM ZINC OXIDE IN AN OXIDIZING ATMOSPHERE. THIS DISADVANTAGE IS OBVIATED BY ADDING ALUMINUM TO THE SOLID SOLUTION. THE ATOM PERCENTAGES OF ZINC AND ALUMINUM ARE 5 TO 36% AND 0.5 TO 5% RESPECTIVELY, THE REMAINDER BEING SILVER OR AN ALLOY, THE MAIN CONSTITUENT OF WHICH IS SILVER.
Inventors
- 👤 Hiroaki Takahashi
- 👤 Toshito Hara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:57
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/023; 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) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |