US3986378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reduction of an oxidized surface of copper or its alloys
Assignee: Individual
•
Filing: 1975-06-16
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Granted: 1976-10-19
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Expires: 1995-06-16
Abstract
Abstract A method of reduction of an oxidized surface of copper or its alloys in the process of hot working thereof, in which the oxidized surface is treated with water, an aqueous emulsion or steam, containing at least 0.15 per cent of ethyl alcohol, when carrying into effect hot working or immediately thereafter.
Inventors
- 👤 Vladimir Yakovlevich Alekhin
- 👤 Mark Moiseevich Ioff
- 👤 Antonina Mikhailovna Streshneva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:04
CPC Classifications
B; B21; B21B; B21B45/00; B21B45/04; B21B45/08; C; C23; C23G; C23G1/00; C23G5/00; B21B3/00; B21B2003/005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
61 words
A method of reduction of an oxidized surface of copper or its alloys in the process of hot working thereof, which comprises treating the oxidized surface with a composition consisting of at least 0.15 per cent of ethyl alcohol and a substance selected from the group consisting of water, an aqueous emulsion and steam, while carrying out the hot working process.
Claim 2
Independent Claim
61 words
A method of reduction of an oxidized surface of copper or its alloys in the process of hot working thereof, which comprises treating the oxidized surface with a composition consisting of at least 0.15 per cent of ethyl alcohol and a substance selected from the group consisting of water, an aqueous emulsion and steam, while carrying out the hot working process.
Claim 3
Independent Claim
62 words
A method of reduction of an oxidized surface of copper or its alloys in the process of hot working thereof, which comprises treating the oxidized surface with a composition consisting of at least 0.15 per cent of ethyl alcohol and a substance selected from the group consisting of water, an aqueous emulsion and steam, immediately after carrying out the hot working process.
Claim 4
Independent Claim
62 words
A method of reduction of an oxidized surface of copper or its alloys in the process of hot working thereof, which comprises treating the oxidized surface with a composition consisting of at least 0.15 per cent of ethyl alcohol and a substance selected from the group consisting of water, an aqueous emulsion and steam, immediately after carrying out the hot working process.
References Cited (Backward Citations)
US3608344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |