Patent US3023149A successfully refreshed from Google Patents.
US3023149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic method of producing thin sheets of aluminum oxide
Assignee: General Electric Co
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Filing: 1957-10-30
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Granted: 1962-02-27
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Expires: 1977-10-30
Abstract
No abstract record available.
Inventors
- 👤 Kenneth P Zeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:32
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/06; C25D11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A METHOD OF PRODUCING AN INTEGRAL AMORPHOUS COHERENT ALUMINUM OXIDE FORM WHICH COMPRISES ANODIZING A HIGH PURITY ALUMINUM BODY OF AT LEAST 99.95+% PURITY WITH DIRECT CURRENT IN AN ACID BATH, AND REVERSING THE POLARITY OF THE ALUMINUM BODY AT THE FINISH OF THE ANODIZING PROCESS TO REMOVE THE OXIDE FORM.
Claim 2
Independent Claim
51 words
A METHOD OF PRODUCING AN INTEGRAL AMORPHOUS COHERENT ALUMINUM OXIDE FORM WHICH COMPRISES ANODIZING A HIGH PURITY ALUMINUM BODY OF AT LEAST 99.95+% PURITY WITH DIRECT CURRENT IN AN ACID BATH, AND REVERSING THE POLARITY OF THE ALUMINUM BODY AT THE FINISH OF THE ANODIZING PROCESS TO REMOVE THE OXIDE FORM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |