Patent US3596030A successfully refreshed from Google Patents.
US3596030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite electric element of silver-cadmium oxide alloy contact
Assignee: Chugai Electric Industrial Co Ltd
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Filing: 1969-04-14
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Granted: 1971-07-27
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Expires: 1989-04-14
Abstract
Abstract A composite electric contact element is disclosed comprising a contact material formed of an alloy of silver-cadmium oxide, the element having a contact face and an opposite face composed of a silver layer with cadmium oxide particles distributed in between, such that the concentration of cadmium oxide particles increases from a minimum at the contact face to a maximum towards the face with the silver layer.
Inventors
- 👤 Akira Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:01
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/023; H01H1/0231; H01B; H01B1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
The composite electric contact element of claim 1, wherein the silver layer has a thickness of about one-eighth to one-tenth of the thickness of the contact element.
Claim 2
Dependent Claim
27 words
The composite electric contact element of claim 1, wherein the thickness of the silver layer is sufficient to bond the contact to a backing or spring plate.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |