US3597290A
Expired / Lapsed
US
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Method for chemically dissolving metal
Assignee: Mitsubishi Edogawa Kagaku KK
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Filing: 1968-03-25
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Granted: 1971-08-03
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Expires: 1988-03-25
Abstract
Abstract THE PRESENT INVENTION PROVIDES A NEW AND IMPROVED METHOD FOR CHEMICALLY DISOLVING METAL, ESPECIALLY, COPPER. ACCORDING TO THE INVENTION, A SOLUTION CONTAINING ACID, HYDROGEN PEROXIDE AND SATURATED LOWER ALIPHATIC ALCOHOL IS USED FOR DISOLVING METAL, EXPECIALLY COPPER. MOREOVER, IF EITHER OR BOTH OF A CATALYTIC AMOUNT OF A METAL ION, WHICH HAS LOWER OXIDATION POTENTIAL T HAN THAT OF COPPER, AND A NITROGEN COMPOUND COMPRISING A BONDING GROUP TO METAL IS ADDED TO SAID SOLUTION, THE PRESENT INVENTION IS MORE EFFECTIVELY PERFORMED.
Inventors
- 👤 Akira Naito
- 👤 Yukiya Masuda
- 👤 Shigeo Osawa
- 👤 Ryozo Kato
- 👤 Kazuo Motegi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:16
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |