US3607244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric contact material and method of making the same
Assignee: Sumitomo Electric Industries Ltd
•
Filing: 1968-03-06
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Granted: 1971-09-21
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Expires: 1988-03-06
Abstract
Abstract Electric contact material of the Ag-CdO type produced by forming Ag-CdO by an internal oxidation process including the addition of Fe or Sn or mixtures in specified amounts simultaneously with the melting of the Ag-Cd alloy.
Inventors
- 👤 Sukeaki Kabayama
- 👤 Eiji Kamijyo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:36
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
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
23 words
A method for producing an electrical contact material as in claim 1 wherein said material is producing in a high-pressure oxygen circulating atmosphere.
Claim 2
Dependent Claim
36 words
A method for producing an electrical contact material as in claim 1 wherein from 0.01 to 0.03 wt.-% Fe is added to said Ag-Cd melt, whereby an oxide of Fe is contained in the final material.
Claim 3
Dependent Claim
38 words
A method for producing an electrical contact material as in claim 3 wherein from 0.5 to 3.0 wt.-% Sn is additionally added to the Ag-Cd melt, whereby oxides of Fe and Sn are contained in the final material.
Claim 4
Dependent Claim
36 words
A method for producing an electrical contact material as in claim 1 wherein from 0.5 to 3.0 wt.-% Sn is added to the Ag-Cd melt whereby an oxide of Sn is contained in the final material.
Claim 5
Dependent Claim
11 words
The electrical contact material produced by the process of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |