US3706604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the coating of metal
Assignee: Henkel Corp
•
Filing: 1971-01-20
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Granted: 1972-12-19
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Expires: 1991-01-20
Abstract
Abstract AN IMPROVED PROCESS FOR COATING METAL WHEREIN A PHOSPHATE OR OXALATE CONVERSION COATING COMPOSITION IS APPLIED TO AN ALUMINUM, ZINC OR FERROUS METAL SURFACE TO FORM A SUBSTANTIALLY DRY, UNIFORM PHOSPHATE OR OXALATE CONVERSION COATING, A PORTION OF WHICH IS WATER-SOLUBLE. AN ORGANIC CONTAINING REDUCING AND/OR ESTERIFYING FIXING OR IMMOBILIZING COATING COMPOSITION CONTAINING HAXAVALENT CHROMIUM IS THEN APPLIED WHICH REACTSOUT THE WATERSOLUBLE PORTION OF THE CONVERSION COATING TO PRODUCE WATER-INSOLUBLE PHOSPHATE OR OXALATES AND FORM A SUBSTANTIALLY DRY, UNIFORM COMPOSITE COATING. THIS PROCESS ELIMINATES THE NEED FOR RINSING PROCEDURES.
Inventors
- 👤 Elmer H Plaxton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:32
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/73; C23C22/76; C23C22/82; C23C22/83
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |