US3778359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc electroplating baths and process
Assignee: Individual
•
Filing: 1972-03-08
•
Granted: 1973-12-11
•
Expires: 1992-03-08
Abstract
Abstract A ZINC ELECTROPLATING BATH HAS A PH BETWEEN 3.5 AND 7.5 AND; IN ADITION, TO THE USUAL ZINC SALTS, CONDUCTING SALTS, BUFFERING SALTS, COMPLEX FORMING SALTS; INCLUDES (A) A BRIGHTENING AGENT OF THE TYPE PRODUCED BY THE REACTION OF ACETYLENIC ALCOHOLS WITH AROMATIC ALDEHYDES OR AROMATIC KETONES, (B) A WETTING AGENT OF THE TYPE PRODUCED BY CONDENSATION OF ETHYLENE OXIDE, (C) ABOUT 0.1-20 GRAMS/LITER OF A MONOCARBOXYLIC AROMATIC ACID (OR SALT THEREOF) HAVING THE CARBOXYL GROUP BONDED DIRECTLY TO THE AROMATIC NUCLEUS, AND (D) ABOUT 0.05-5 GRAMS/LITER OF AN AROMATIC ALDEHYDE OR AROMATIC KETONE.
Inventors
- 👤 F Popescu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:14
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/22
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |