Alkaline bright zinc electroplating
Abstract
Abstract SEMI-BRIGHT ZINC IS ELECTRODEPOSITED FROM ALKALINE ZINC ELECTRODEPOSITING BATHS COMPRISING AN ALKALINE SOLUTION CONTAINING A SOURCE OF ZINC IONS AND AN EFFECTIVE AMOUNT, AS A BRIGHTENING AGENT, OF A BATH-SOLUBLE REACTION PRODUCT OBTAINED BY THE REACTION OF MELAMINE WITH FORMALDEHYDE. IN ANOTHER EMBODIMENT THE BRIGHTENING AGENT IS THE BATHSOLUBLE REACTION PRODUCT OF MELAMINE WITH FORMALDEHYDE AND AN EPIHALOHYDRIN OR A GLYCEROL CHLOROHYDRIN. THE MELAMINE-FORMALDEHYDE REACTION PRODUCT AND MELAMINEJFORMALDEHYDE-EPIHALOHYDRIN OR MELAMINE-FORMALDEHYDEGLYCEROL CHLOROHYDRIN REACTION PRODUCT ARE USUALLY EACH UTILIZED AS BRIGHTENER IN THE ALKALINE ZINC BATHS IN COMBINATION WITH A FORMALDEHYDE-ACYCLIC AMINE-EPIHALOHYDRIN REACTION PRODUCT WHEREIN THE ACYCLIC AMINE HAS TWO OR MORE FUNCTIONAL GROUPS.
Inventors
- 👤 P Szilagyi
- 👤 J Hajdu
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |