US3824159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of anodically coating aluminum
Assignee: Isovolta AG
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Filing: 1972-05-10
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Granted: 1974-07-16
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Expires: 1992-05-10
Abstract
Abstract DECRIBES A METHOD OF COATING OBJECTS MADE ENTRIELY OR PARTLY OF ALUMINUM OR AN ALUMINUM ALLOY, IN WHCIH THE PART TO BE COATED IS ANODICALLY OXIDIZED IN AN ELECTROLYTE BATH CONTAINING AT LEAST ONE ALKALINE SILICATE SOLUBLE IN THE ELECTROLYTE BATH AND AT LEAST ONE ORGANIC COMPLEX-FORMING SUBSTANCE, BY THE APPLICATION OF DIRECT CURRENT, ALTERNATING CURRENT OR PULSATING CURRENT.
Inventors
- 👤 F Wehrmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:22
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/06
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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |