US3672970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic codeposition of copper with fine particles
Assignee: Udylite Corp
•
Filing: 1969-06-19
•
Granted: 1972-06-27
•
Expires: 1989-06-19
Abstract
Abstract FINE PARTICLES OF NON-CONDUCTING MATERIALS DO NOT CODEPOSIT READILY FROM AQUEOUS ACIDIC COPPER PLATING BATHS, UNLESS THERE IS PRESENT IN THE BATH MONOVALENT CATIONS SUCH AS THALLIUM, AMMONIUM AND THE ALKALI METAL CATIONS. THESE MONOVALENT CATIONS ARE ESPECIALLY EFFECTIVE IN ACIDIC COPPER SULFATE PLATING BATHS FOR THE CODEPOSITION OF DISPERSED FINE, BATH-INSOLUBLE, NON-CONDUCTING PARTICLES SUCH AS BARIUM SULFATE, ZIRCONIUM OXIDE, ETC. POSSIBLE ENGINEERING APPLICATIONS FOR SUCH 2-PHASE COMPOSITE PLATES ARE IN ANTI-SEIZING AND IMPROVED WEAR RESISTANCE.
Inventors
- 👤 Thaddeus W Tomaszewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:35
CPC Classifications
C; C25; C25D; C25D15/00; C25D15/02
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |