US3672966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the treatment of anodic oxidized aluminum surfaces
Assignee: Henkel AG and Co KGaA
•
Filing: 1970-07-08
•
Granted: 1972-06-27
•
Expires: 1990-07-08
Abstract
Abstract AN IMPROVEMENT IN THE TREATMENT OF ANODIC OXIDIZED ALUMINUM SURFACES WITH SUBSEQUENT SEALING WITH HOT WATER OR STEAM. THE IMPROVEMENT COMPRISES EITHER AN INTERMEDIATE TREATMENT OR A COMBINED TREATMENT WITH THE SEALING OF THE ALUMINUM SURFACES AT FROM 15*C. TO 95*C. WITH A SOLUTION OF ACRYLIC ACID AND/OR A POLYMER OF ACRYLIC ACID, METHACRYLIC ACID OR MALEIC ACID HAVING A SPECIFIC VISCOSITY OF UP TO N=0.75 CP. IN A 0.7% SOLUTION IN 2 N NAOH AT 20*C. THE TREATMENT PREVENTS THE FORMATION OF SEALING FILMS WITHOUT IMPAIRING THE ANODIC OXIDE COATING OR THE QUALITY OF THE AFTER-SEALING.
Inventors
- 👤 Roland Geisler
- 👤 Hans Gunther Germscheid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:26
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/18; C25D11/24; C25D11/246
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |