US3280013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anodizing electrolyte and process
Assignee: Alcoa Corp
•
Filing: 1964-06-02
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Granted: 1966-10-18
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Expires: 1984-06-02
Abstract
No abstract record available.
Inventors
- 👤 Economy George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:25
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/14; C25D11/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
50 words
A PROCESS FOR ANODIZING ALUMINUM, COMPRISING MAKING AN ALUMINUM ARTICLE ANODE IN AN ELECTROLYTE CONSISTING ESSENTIALLY OF AT LEAST ABOUT 5 GRAMS PER LITER OF SUCCINIC ACID, A NON-ACID HYDROGEN OF WHICH IS SUBSTITUTED WITH THE GROUP -SO2H, AT LEAST ABOUT 1/2 GRAM PER LITER OF SULFURIC ACID, AND WATER.
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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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |