US3692640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous anodic oxidation method for aluminum and alloys thereof
Assignee: Panasonic Holdings Corp
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Filing: 1970-09-14
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Granted: 1972-09-19
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Expires: 1990-09-14
Abstract
Abstract A METHOD OF CONTINUOUSLY FORMNG AN OXIDE FILM ON ALUMINUM AND ALLOYS THERREOF BY ANODIC OXIDATION WITHOUT RESORTING TO A CONVENTIONAL PROCESS USING AN ELECTROLYTIC CELL, AND AN APPARATUS FOR PRACTICING THE METHOD WHICH IS COMPACT IN SIZE AND IS CAPABLE OF NOT ONLY HIGH CURRENT DENSITY TREATMENT AND HIGH SPEED TREATMENT BUT ALSO VARIOUS TYPES OF ELECTROLYSIS.
Inventors
- 👤 Takeshi Hamabe
- 👤 Takashi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:47
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/005; C25D11/02; C25D11/04; C25D11/06; C25D11/08
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |