US3773503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper base alloy
Assignee: American Smelting and Refining Co
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Filing: 1971-11-04
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Granted: 1973-11-20
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Expires: 1991-11-04
Abstract
Abstract Copper base alloys containing essentially, by weight, 0.002 to 0.015 percent phosphorous, 0.02 to 0.04 percent tellurium, balance substantially all copper. Continuously cast castings of the alloy are preferred. The alloys, after cold working, exhibit retention of high strength characteristics including high tensile strengths after exposure to high annealing temperatures for substantial periods. The alloys also have high electrical and thermal conductivity before and after exposure to high annealing temperatures for substantial periods as well as satisfactory elongation.
Inventors
- 👤 P Kranz
- 👤 V Little
- 👤 M Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:13
CPC Classifications
C; C22; C22C; C22C9/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
13 words
The continuously cast casting of claim 1 in the form of a cake.
References Cited (Backward Citations)
US2027807A
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US2102742A
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US2264287A
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US2268938A
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US2268940A
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US2268939A
Cited
US3700842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |