US3592754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the anodic oxidation of a plurality of aluminum workpieces
Assignee: Individual
•
Filing: 1968-10-28
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Granted: 1971-07-13
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Expires: 1988-10-28
Abstract
Abstract THIS INVENTION RELATES TO A PROCESS FOR THE MASS-PRODUCTIVE FORMATION OF HARD OXIDE COATING ON A NUMBER OF ALUMINUM STOCKS THROUGH ANODIC OXIDATION TECHNIQUE, WHEREIN SAID STOCKS IMMERSED IN AN ELECTROLYTIC ACID BATH AND CONNECTED ELECTRICALLY IN PARALLEL TO THE ANODIC SIDE OF AN ELECTROLYTIC CURRENT SOURCE. THE PROCESS IS CHARACTERIZED BY THAT SAID STOCKS ARE CONNECTED TO THE ANODE THROUGH THE INTERMEDIARY OF RESPECTIVE RESISTORS. THE RESISTANCE VALUES OF THESE RESISTORS ARE PREFERABLY SO SELECTED THAT A VOLTAGE DROP, IN THE ORDER OF SAY AMOUNTING TO 1-2 VOLTS WILL TAKE PLACE IN THE ANODIC CURRENT PATH.
Inventors
- 👤 Kosaku Aihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:17
CPC Classifications
C; C25; C25D; C25D17/00; C25D17/06; C25D11/00; C25D11/005; C25D11/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |