US3749596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for sealing anodized aluminum
Assignee: Okuno Chemical Industries Co Ltd
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Filing: 1971-05-11
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Granted: 1973-07-31
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Expires: 1991-05-11
Abstract
Abstract A COMPOSITION FOR SEALING ALUMINUM OXIDE COATING ANODICALLY FORMED ON ALUMINUM AND ALUMINUM BASE ALLOYS COMPRISES AN AQUEOUS SOLUTION CONTAINING AT LEAST ONE G./LITER OF OXYGEN ACID ION OF PHOSPHORUS AND AT LEAST 0.2 G./LITER OF ALKALINE EARTH METAL ION AND HAVING A PH OF 2.5 TO 9.0, AND A METHOD FOR SEALING THE ALUMINUM OXIDE COATING COMPRISES CONTACTING THE COATING WITH SAID COMPOSITION AT 20 TO 50*C. AND DRYING THE RESULTANT COATING.
Inventors
- 👤 C Yoshimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:09
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/18; C25D11/24; C25D11/246
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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |