US3337338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tungsten powder bodies infiltrated with copper-titanium bismuth or copper-titanium-tin
Assignee: Duracell Inc USA
•
Filing: 1966-10-21
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Granted: 1967-08-22
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Expires: 1986-10-21
Abstract
No abstract record available.
Inventors
- 👤 Richard H Krock
- 👤 Edward J Zdanuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:05
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/0203; C; C22; C22C; C22C9/00; H01B; H01B1/00; H01B1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A METHOD OF MAKING A TUNGSTEN POWDER BODY INFILTRATED WITH A TERNARY ALLOY OF COPPER FOR USE AS AN ELECTRICAL CONTACT MATERIAL IN VACUUM ENVIRONMENTS COMPRISING THE STEPS OF COMPACTING TUNGSTEN PARTICLES INTO A DESIRED BODY SHAPE; CONTACTING THE SURFACES OF THE COMPACTED TUNGSTEN BODY WITH SAID TERNARY ALLOY OF COPPER, SAID ALLOY CONTAINING AN AGENT FOR PROMOTING THE WETTING OF SAID TUNGSTEN PARTICLES; PLACING SAID TUNGSTEN BODY AND SAID CONTACTING ALLOY IN A VACUUM ATMOSPHERE; AND HEATING SAID TUNGSTEN BODY AND SAID CONTACTING ALLOY SO AS TO COMPLETELY VACUUM INFILTRATE SAID TUNGSTEN BODY WITH SAID ALLOY OF COPPER THEREBY FORMING A COMPOSITE MATERIAL FOR USE AS A CONTACT MATERIAL IN A VACUUM SWITCHING DEVICE.
Claim 2
Independent Claim
115 words
A METHOD OF MAKING A TUNGSTEN POWDER BODY INFILTRATED WITH A TERNARY ALLOY OF COPPER FOR USE AS AN ELECTRICAL CONTACT MATERIAL IN VACUUM ENVIRONMENTS COMPRISING THE STEPS OF COMPACTING TUNGSTEN PARTICLES INTO A DESIRED BODY SHAPE; CONTACTING THE SURFACES OF THE COMPACTED TUNGSTEN BODY WITH SAID TERNARY ALLOY OF COPPER, SAID ALLOY CONTAINING AN AGENT FOR PROMOTING THE WETTING OF SAID TUNGSTEN PARTICLES; PLACING SAID TUNGSTEN BODY AND SAID CONTACTING ALLOY IN A VACUUM ATMOSPHERE; AND HEATING SAID TUNGSTEN BODY AND SAID CONTACTING ALLOY SO AS TO COMPLETELY VACUUM INFILTRATE SAID TUNGSTEN BODY WITH SAID ALLOY OF COPPER THEREBY FORMING A COMPOSITE MATERIAL FOR USE AS A CONTACT MATERIAL IN A VACUUM SWITCHING DEVICE.
References Cited (Backward Citations)
US2797300A
Cited
US3303026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |