US3692583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Desmutting etched aluminum alloys
Assignee: FMC Corp
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Filing: 1971-03-01
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Granted: 1972-09-19
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Expires: 1991-03-01
Abstract
Abstract ALUMINUM ALLOYS WHICH ARE COVERED WITH AN INSOLUBLE SMUT DUE TO ALKALI OR OTHER TREATMENT ARE CLEANED AND BRIGHTENED BY AQUEOUS COMPOSITIONS CONTAINING MINERAL ACIDS AND PEROXYDIPHOSPHATE IONS.
Inventors
- 👤 Paul R Mucenieks
- 👤 Dirk J Muyskens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:45
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/12; C23G1/125; C11; C11D; C11D3/00; C11D3/39; C11D3/3942; C11D3/3945
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |