Patent US3666428A successfully refreshed from Google Patents.
US3666428A
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Silver-cadmium oxide electrical contact materials
Assignee: Duracell Inc USA
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Filing: 1970-03-09
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Granted: 1972-05-30
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Expires: 1990-03-09
Abstract
Abstract A SILVER LAYER IS APPLIED TO SILVER-CADMIUM ALLOYS BY FIRST OXIDIZING A PORTION OF A SILVER-CADMIUM ALLOY, APPLYING A BONDING LAYER, AND THEN THE SILVER-CADMIUM ALLOY IS COMPLETELY OXIDIZED.
Inventors
- 👤 Frederick O Haarbye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:45
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/023; H01H1/0231; C; C22; C22C; C22C32/00; C22C32/001; C22C32/0015; C22C32/0021; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9265; Y10S428/929; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12021; Y10T428/12028; Y10T428/12063; Y10T428/12069; Y10T428/12076; Y10T428/12146; Y10T428/12493; Y10T428/1266; Y10T428/12667; Y10T428/12771; Y10T428/12861; Y10T428/12882; Y10T428/12896
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |