US3708329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroless copper plating
Assignee: AT&T Inc
•
Filing: 1971-09-10
•
Granted: 1973-01-02
•
Expires: 1991-09-10
Abstract
Abstract CERTAIN HETEROCYCLIC AROMATIC NITROGEN COMPOUNDS, WHEN ADDED TO CONVENTIONAL ELECTROLESS COPPER PLATING BATHS IN SMALL AMOUNTS, STABILIZE THESE BATHS AGAINST SPONTANEOUS DECOMPOSITION INTO METALLIC COPPER. A PARTICULAR ADVANTAGE OF THESE STABILIZING AGENTS IS THAT THEY DO NOT ADVERSELY AFFECT THE PLATING RATE. INDEED, WITH SOME COMPOUNDS THE PLATING RATE IS SIGNIFICANTLY INCREASED BY THE ADDITION OF THE STABILIZING AGENT.
Inventors
- 👤 L Schonenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:19
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/38; C23C18/40; Y; Y10; Y10S; Y10S8/00; Y10S8/12; Y10S8/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |