US3045331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical contacts of high arc erosion resistance and method of making the same
Assignee: Duracell Inc USA
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Filing: 1959-06-26
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Granted: 1962-07-24
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Expires: 1979-06-26
Abstract
No abstract record available.
Inventors
- 👤 Ang Choh-Yi
- 👤 Eugene W Burkhammer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:58
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/025; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/929; Y10S75/00; Y10S75/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PRESSED AND SINTERED ELECTRICAL CONTACT HAVING A DENSITY AT LEAST 95% OF THE THEORETICAL DENSITY COMPOSED OF AT LEAST 48 ATOMIC PERCENT OF COPPER, BETWEEN 0.5 AND 5 ATOMIC PERCENT SILVER, AND AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM AND TUNGSTEN CONSTITUTING THE REMAINDER, SAID CONTACT BEING FREE FROM INFILTRATED CONSTITUENTS AND FROM THE FRAGILITY AND BRITTLENESS CHARACTERISTIC OF CONTACTS HAVING SIMILAR COMPOSITION BUT CONTAINING NO SILVER.
Claim 2
Dependent Claim
72 words
A PRESSED AND SINTERED ELECTRICAL CONTACT HAVING A DENSITY AT LEAST 95% OF THE THEORETICAL DENSITY COMPOSED OF AT LEAST 48 ATOMIC PERCENT OF COPPER, BETWEEN 0.5 AND 5 ATOMIC PERCENT SILVER, AND AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM AND TUNGSTEN CONSTITUTING THE REMAINDER, SAID CONTACT BEING FREE FROM INFILTRATED CONSTITUENTS AND FROM THE FRAGILITY AND BRITTLENESS CHARACTERISTIC OF CONTACTS HAVING SIMILAR COMPOSITION BUT CONTAINING NO SILVER.
References Cited (Backward Citations)
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Cited
US2156802A
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US2162380A
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US2227446A
Cited
US2295334A
Cited
US2283859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |