US2843513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixture and method for imparting a corrosion-resistant surface to aluminum, aluminumalloys, and silver
Assignee: Allied Res Products Inc
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Filing: 1954-07-28
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Granted: 1958-07-15
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Expires: 1974-07-28
Abstract
No abstract record available.
Inventors
- 👤 Stricklen Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:16
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/37
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
AN AQUEOUS ACID BATH FOR COATING ALUMINUM AND ALLOYS THEREOF IN WHICH ALUMINUM IS THE PREDOMINANT INGREDIENT, OF THE TYPE WHEREIN THE ESSENTIAL COATINGPRODUCING INGREDIENTS ARE HEXAVALENT CHROMIUM AND A SOLUBLE FLUORINE-BEARING COMPOUND IN COATING-PRODUCING PROPORTIONS; CONTAINING, AS AN ADDITION AGENT, A QUANTITY OF BORON (CALCULATED AS BORIC ACID) IN EXCESS OF THE AMOUNT REQUIRED FOR REACTION WITH ALL OF THE FLUORINE PRESENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |