Alkaline bright zinc electroplating
Abstract
Abstract BRIGHT ZINC IS ELECTRODEPOSITED FROM ALKALINE NONCYANIDE OR CYANIDE ZINC ELECTRODEPOSITING BATHS COMPRISING AN ALKALINE SOLUTION CONTAINING A SOURCE OF ZINC IONS AND AN EFFECTIVE AMOUNT, AS BRIGHTENING AGENT, OF A BATH-SOLUBLE REACTION PRODUCT OBTAINED BY THE REACTION OF MELAMINE WITH FORMALDEHYDE, AND ACYLIC AMINE HAVING TWO OR MORE FUNCTIONAL GROUPS AND AN EPIHALOHYDRIN OR A GLYCEROL CHLOROHYDRIN. THE MELAMINE-FORMALDEHYDE-ACYLIC AMINEEPIHALOHYDRIN REACTION PRODUCT OR MELAMINE-FORMALDEHYDE-ACYLIC AMINE-GLYCEROL CHLOROHYDRIN REACTION PRODUCT IS USUALLY UTILIZED AS BRIGHTENER IN THE ALKALINE ZINC BATHS IN COMBINATION WITH AN AROMATIC ALDEHYDE AS AN ADDITIONAL BRIGTENING AGENT.
Inventors
- 👤 P Szilagyi
Bibliographic Details
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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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |