Patent US3913201A successfully refreshed from Google Patents.
US3913201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonded material for electrical contact pieces
Assignee: Siemens AG
•
Filing: 1973-06-01
•
Granted: 1975-10-21
•
Expires: 1993-06-01
Abstract
Abstract Bonded or compound material for electrical contact pieces, consisting of silver as an original metal with up to 20% by weight of at least one finely divided metal oxide, such as CdO, SnO2, ZnO, MgO and/or NiO, and up to 15% by weight of finely divided lead.
Inventors
- 👤 Horst Schreiner
- 👤 Rudolf Scherbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:36
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/001; C22C32/0015; C22C32/0021; H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/023; H01H1/0237; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
BONDED MAATERIAL, PARTICULARLY FOR ELECTRICAL CONTACT PIECES, CONSISTING OF SILVER, FROM 0.5 TO 20% BY WEIGHT OF ONE FINELY DISTRIBUTED METAL OXIDE SELECTED FROM CDO, SNO2, ZNO, NGO AND NIO AND MIXTURES THEREOF, FROM 3 TO 15% BY WEIGHT OF FINELY DIVIDED LEAD UNIFORMLY EMBEDDED IN SAID SILVER.
Claim 2
Dependent Claim
48 words
BONDED MAATERIAL, PARTICULARLY FOR ELECTRICAL CONTACT PIECES, CONSISTING OF SILVER, FROM 0.5 TO 20% BY WEIGHT OF ONE FINELY DISTRIBUTED METAL OXIDE SELECTED FROM CDO, SNO2, ZNO, NGO AND NIO AND MIXTURES THEREOF, FROM 3 TO 15% BY WEIGHT OF FINELY DIVIDED LEAD UNIFORMLY EMBEDDED IN SAID SILVER.
References Cited (Backward Citations)
US2145690A
Cited
US2486341A
Cited
US2654945A
Cited
US2985532A
Cited
US3114631A
Cited
US3205565A
Cited
US3385677A
Cited
US3489531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |