US3329536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solution and accelerated process for coating aluminum
Assignee: Henkel Corp
•
Filing: 1963-07-11
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Granted: 1967-07-04
•
Expires: 1983-07-11
Abstract
No abstract record available.
Inventors
- 👤 Herman J Lodeesen
- 👤 William S Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:37
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A METHOD FOR FORMING A PROTECTIVE COATING ON THE SURFACE OF ALUMINUM AND ITS ALLOYS, WHICH COMPRISES THE STEPS OF APPLYING TO SAID SURFACE AN AQUEOUS ACIDIC SOLUTION COMPRISING THE HEXAVALENT CHROMIUM ION IN AN AMOUNT EQUIVALENT TO ABOUT 0.05% TO ABOUT 5% OF CRO3, ACTIVE FLUORIDE ION IN AN AMOUNT OF ABOUT 0.01% TO ABOUT 0.7%, AND AT LEAST ONE ION SELECTED FROM THE GROUP CONSISTING OF THE SELENIUM ION AND THE TELLURIUM ION IN AN AMOUNT EQUIVALENT TO ABOUT 0.01% TO ABOUT 5% OF SELENIUM DIOXIDE.
Claim 2
Independent Claim
88 words
A METHOD FOR FORMING A PROTECTIVE COATING ON THE SURFACE OF ALUMINUM AND ITS ALLOYS, WHICH COMPRISES THE STEPS OF APPLYING TO SAID SURFACE AN AQUEOUS ACIDIC SOLUTION COMPRISING THE HEXAVALENT CHROMIUM ION IN AN AMOUNT EQUIVALENT TO ABOUT 0.05% TO ABOUT 5% OF CRO3, ACTIVE FLUORIDE ION IN AN AMOUNT OF ABOUT 0.01% TO ABOUT 0.7%, AND AT LEAST ONE ION SELECTED FROM THE GROUP CONSISTING OF THE SELENIUM ION AND THE TELLURIUM ION IN AN AMOUNT EQUIVALENT TO ABOUT 0.01% TO ABOUT 5% OF SELENIUM DIOXIDE.
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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) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |