Bright tin-lead alloy plating
Abstract
Abstract THIS INVENTION RELATES TO THE ELECTRODEPOSITION OF TINLEAD ALLOYS; TIN-LEAD ALLOY PLATING COMPOSITIONS. TIN-LEAD ALLOY PLATING BATHS; AND TO PROCESSES FOR THE ELECTRODEPOSITION OF TIN-LED ALLOYS IN THE PRESENCE OF: (A) AT LEAST ONE POLYETHER SURFACTANT; AND (B) AT LEAST ONE AROMATIC ALDEHYDE EXHIBITING AT LEAST ONE CHLORO SUBSTITUENT OR AT LEAST ONE COMPOUND PRODUCING AN AROMATIC ALDEHYDE EXHIBITING AT LEAST ONE CHLORO SUBSTITUENT. A PREFERRED ASPECT OF THIS INVENTION LIES IN THE ELECTROEPOSITION OF TIN-LEAD ALLOYS IN THE PRESENCE OF A COMBINATION OF: (A) AT LEAST ONE POLYETHER SURFACTANT; (B) AT LEAST ONE AROMATIC ALDEHYDE EXHIBITING AT LEAST ONE CHLORO SUBSTITUENT OR AT LEAST ONE COMPOUND PRODUCING AN AROMATIC ALDEHYDE EXHIBITING AT LEAST ONE CHLORO SUBSTITUENT; (C) AT LEAST ONE ALIPHATIC AMINE OR AT LEAST ONE COMPOUND PRODUCING AN ALIPHATIC AMINE; AND (D) AT LEAST ONE ANTI-OXIDANT OR OXYGEN ACCEPTOR.
Inventors
- 👤 S Valayil
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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |