US3275537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of anodizing aluminum
Assignee: JJ Carnaud and Forges de Basse Indre SA
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Filing: 1963-04-24
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Granted: 1966-09-27
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Expires: 1983-04-24
Abstract
No abstract record available.
Inventors
- 👤 Petin Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:33
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A METHOD OF ANODIZING ALUMINUM COMPRISING THE STEP OF EMPLOYING THE ALUMINUM TO BE TREATED AS THE ANODE IN A BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF A BISULFATE OF AN ALKALI METAL, OF AN ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF CITRIC ACID AND TARTARIC ACID, AND OF ZINC SULFATE.
Claim 2
Independent Claim
53 words
A METHOD OF ANODIZING ALUMINUM COMPRISING THE STEP OF EMPLOYING THE ALUMINUM TO BE TREATED AS THE ANODE IN A BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF A BISULFATE OF AN ALKALI METAL, OF AN ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF CITRIC ACID AND TARTARIC ACID, AND OF ZINC SULFATE.
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |