Metal coating process
Abstract
Abstract A METAL COATING PROCESS WHICH COMPRISES APPLYING A PHOSPHATE OR OXALATE CONVERSION COATING COMPOSITION TO A ZINC, ALUMINUM OR FERROUS METAL SURFACE TO FORM A SUBSTANTIALLY DRY, UNIFORM CONVERSION COATING, A PORTION OF WHICH IS WATER-SOLUBLE. A NEWTRALIZING FIXING OR IMMOBILIZING COATING COMPOSITION IS THEN APPLIED WHICH REACTS OUT THE WATER-SOLUBLE PORTION OF THE CONVERSION COATING TO PRODUCE WATER-INSOLUBLE PHOSPHATES OR OXALATES AND FORMS A SUBSTANTIALLY DRY, UNIFORM COMPOSITE COATING. A HEXAVALENT CHROMIUM-CONTAINING STABILIZING OR PASSIVATING COMPOSITION IS ALSO APPLIED, EITHER IN A SEPARATE COATING STEP OR PREFERABLY BY INCORPORATING THE HEXAVALENT CHROMIUM CONTAINING MATERIAL IN THE FIXING COATING COMPOSITON. PREFERABLY, ALL OF TSHE COATING MATERIALS ARE APPLIED BY "MISTON" TYPE SPRAY APPLICATION.
Inventors
- 👤 Elmer H Plaxton
Bibliographic Details
Claims Analysis
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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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |