US3756957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solutions for chemical dissolution treatment of metallic materials
Assignee: Furukawa Electric Co Ltd
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Filing: 1971-03-15
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Granted: 1973-09-04
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Expires: 1991-03-15
Abstract
Abstract SOLUTIONS FOR THE CHEMICAL DISSLUTION TREATMENT OF METALLIC MATERIALS COMPRISING AN AQUEOUS SOLUTION OF SULPHURIC ACID, HYDROGEN PEROXIDE AND AT LEAST ONE ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC AMINES AND THEIR SALTS, ALKOXY AMINES, ALIPHATIC ACID AMIDES AND ALICYCLIC IMINES, SAID ORGANIC COMPOUND BEING PRESENT IN AN AMOUNT OF MORE THAN 0.001 G./1.
Inventors
- 👤 S Shiga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:22
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/46; C23F1/10; C23F1/14; C23F1/16; C23F3/00; C23F3/04; C23F3/06; C23G; C23G1/00; C23G1/02; C23G1/10; H; H05; H05K; H05K3/00; H05K3/02; H05K3/06; H05K3/067
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |