US3663441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparing aluminum alloys for finishing
Assignee: Shipley Co Inc
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Filing: 1970-08-05
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Granted: 1972-05-16
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Expires: 1990-08-05
Abstract
Abstract A COMPOSITION FOR PREPARING AN ALUMINUM ALLOY CONTAINING AT LEAST 0.1 PERCENT SILICON FOR FINISHING. THE COMPOSITION IS CHARACTERIZED BY ITS ABILITY TO DISSOLVE ALUMINUM FROM THE SURFACE OF THE ALLOY LEAVING SILICON AND OTHER INSOLUBLE ALLOYING METALS BEHIND AS A NORMALLY, VISIBLE, ADHERENT COATING RESISTANT TO OXIDATION AND HIGHLY RECEPTIVE TO FINISHING OPERATIONS SUCH AS METAL PLATING, PAINTING AND THE LIKE.
Inventors
- 👤 Michael Gulla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:22
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/20; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/1803; C23C18/1824; C23C18/1837; C23C18/1844; C23C18/31; C23C18/32; C23C18/34; C23C18/36; C25; C25D; C25D5/00; C25D5/34; C25D5/42; C25D5/44
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |