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US3143626A
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Sintered electric contact of high contact-fusing resistance
Assignee: Siemens Schuckertwerke AG
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Filing: 1963-03-08
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Granted: 1964-08-04
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Expires: 1983-03-08
Abstract
No abstract record available.
Inventors
- 👤 Schreiner Horst
- 👤 Lehmann Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:18
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/002; B22F7/02; H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/023; H01H1/0231
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A SINTERED ELECTRIC CONTACT BODY OF HIGH WELDING RESISTANCE, COMPRISING TWO LAYERS SINTER-BONDED TO EACH OTHER, ONE OF SAID LAYERS FORMING AN ELECTRIC CONTACT SURFACE AND CONSISTING OF A SILVER-LEAD COMPOSITION AND HAVING A POROSITY BETWEEN 5 AND 20 VOLUME PERCENT, SAID OTHER LAYER FORMING A SOLDERABLE BACKING AND CONSISTING OF METAL SELECTED FROM THE GROUP CONSISTING OF SILVER, COPPER AND SILVER ALLOYS HAVING A PREDOMINANT SILVER CONTENT, SAID BACKING LAYER BEING POROUS IN ITS INNER BUT DENSE AT THE SURFACE REMOTE FROM SAID ONE LAYER.
Claim 2
Dependent Claim
86 words
A SINTERED ELECTRIC CONTACT BODY OF HIGH WELDING RESISTANCE, COMPRISING TWO LAYERS SINTER-BONDED TO EACH OTHER, ONE OF SAID LAYERS FORMING AN ELECTRIC CONTACT SURFACE AND CONSISTING OF A SILVER-LEAD COMPOSITION AND HAVING A POROSITY BETWEEN 5 AND 20 VOLUME PERCENT, SAID OTHER LAYER FORMING A SOLDERABLE BACKING AND CONSISTING OF METAL SELECTED FROM THE GROUP CONSISTING OF SILVER, COPPER AND SILVER ALLOYS HAVING A PREDOMINANT SILVER CONTENT, SAID BACKING LAYER BEING POROUS IN ITS INNER BUT DENSE AT THE SURFACE REMOTE FROM SAID ONE LAYER.
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) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |