US3728164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming a chemical coating on aluminum or aluminum alloy
Assignee: Altemira Co Ltd
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Filing: 1970-09-23
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Granted: 1973-04-17
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Expires: 1990-09-23
Abstract
Abstract A METHOD FOR FORMING A CHEMICAL COATING ON ALUMINUM OR ALUMINUM ALLOY IN WHICH THE ALUMINUM OR ALUMINUM ALLOY IS IMMERSED IN AN AQUEOUS SOLUTION CONTAINING MONOETHYLAMINE OR DIETHYLAMINE. THE AQUEOUS SOLUTION CAN BE HEATED EITHER BEFORE OR AFTER THE ADDITION OF MONOETHYLAMINE OR DIETHYLAMINE. AFTER IMMERSING, THE METAL MAY BE SUBJECTED TO PRESSURIZED STEAM.
Inventors
- 👤 T Abe
- 👤 K Aizawa
- 👤 M Oguri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:11
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/60; C23C22/66
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |