Patent US3305324A successfully refreshed from Google Patents.
US3305324A
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Tungsten powder bodies infiltrated with copper-titanium-bismuth or copper-titanium-tin
Assignee: Duracell Inc USA
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Filing: 1966-05-26
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Granted: 1967-02-21
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Expires: 1986-05-26
Abstract
No abstract record available.
Inventors
- 👤 Richard H Krock
- 👤 Edward J Zdanuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:40
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/0203; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/925; Y10S428/9265; Y10S428/929; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/1216; Y10T428/12174
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A COMPOSITE MATERIAL FOR USE AS AN ELECTRICAL CONTACT MATERIAL IN VACUUM SWITCHING DEVICES CONSISTING OF A TUNGSTEN POWDER BODY COMPLETELY INFILTRATED WITH A TERNARY COPPER ALLOY.
Claim 2
Dependent Claim
27 words
A COMPOSITE MATERIAL FOR USE AS AN ELECTRICAL CONTACT MATERIAL IN VACUUM SWITCHING DEVICES CONSISTING OF A TUNGSTEN POWDER BODY COMPLETELY INFILTRATED WITH A TERNARY COPPER ALLOY.
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |