US2844529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for rapidly anodizing aluminum
Assignee: Reynolds Metals Co
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Filing: 1955-01-17
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Granted: 1958-07-22
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Expires: 1975-01-17
Abstract
No abstract record available.
Inventors
- 👤 Cybriwsky Alexander
- 👤 Mostovych Nicholas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:16
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/06; C25D11/08; C25D11/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A METHOD OF ANODIZING A SURFACE AN ANODE COMPOSED OF ALUMINUM WHICH COMPRISES: INTRODUCING SAID ANODE INTO AN ACIDIC ELECTROLYTIC ANODIZING LIQUID BATH IN A MANNER MAINTAINING A PREDETERMINED SURFACE AREA OF SAID ANODE IN ACTIVE CONTACT WITH SAID BATH; PASSING AN ELECTRIC CURRENT FROM SAI ANODE THROUGH THE BATH AT A PREDETERMINED RATE TO MAINTAIN A HIGH ANODIZING CURRENT DENSITY OVER SAID ACTIVE SURFACE AREA; CONDITIONING THE BATH TO MAINTAIN ITS TEMPERATURE BELOW A VALUE AT WHICH SUBSTANTIAL DISSOLUTION OF ALUMINUM FROM SAID ACTIVE SURFACE AREA OCCURS; AND MAINTAINING A TEMPERATURE DIFFERENTIAL OF AT LEAST 10*F. BETWEEN SAID ANODE AND SAID BATH BY CONTINUOUSLY ENGAGING ANOTHER SURFACE OF SAID ANODE IN HEAT EXCHANGE RELATIONSHIP WITH A CONDITIONING SURFACE WHILE SAID PREDETERMINED ANODE SURFACE IS SUBJECTED TO SAID ANODIZING CURRENT.
Claim 2
Independent Claim
130 words
A METHOD OF ANODIZING A SURFACE AN ANODE COMPOSED OF ALUMINUM WHICH COMPRISES: INTRODUCING SAID ANODE INTO AN ACIDIC ELECTROLYTIC ANODIZING LIQUID BATH IN A MANNER MAINTAINING A PREDETERMINED SURFACE AREA OF SAID ANODE IN ACTIVE CONTACT WITH SAID BATH; PASSING AN ELECTRIC CURRENT FROM SAI ANODE THROUGH THE BATH AT A PREDETERMINED RATE TO MAINTAIN A HIGH ANODIZING CURRENT DENSITY OVER SAID ACTIVE SURFACE AREA; CONDITIONING THE BATH TO MAINTAIN ITS TEMPERATURE BELOW A VALUE AT WHICH SUBSTANTIAL DISSOLUTION OF ALUMINUM FROM SAID ACTIVE SURFACE AREA OCCURS; AND MAINTAINING A TEMPERATURE DIFFERENTIAL OF AT LEAST 10*F. BETWEEN SAID ANODE AND SAID BATH BY CONTINUOUSLY ENGAGING ANOTHER SURFACE OF SAID ANODE IN HEAT EXCHANGE RELATIONSHIP WITH A CONDITIONING SURFACE WHILE SAID PREDETERMINED ANODE SURFACE IS SUBJECTED TO SAID ANODIZING CURRENT.
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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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |