US3666636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic codeposition of fine particles with copper
Assignee: Udylite Corp
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Filing: 1969-06-19
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Granted: 1972-05-30
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Expires: 1989-06-19
Abstract
Abstract FINE PARTICLES OF MANY NON-CONDUCTING MATERIALS DO NOT CODEPOSIT READILY FROM AQUEOUS ACIDIC COPPER ELECTROPLATING BATHS, UNLESS THERE IS PRESENT IN THE BATH ALIPHATIC AMINES, ESPECIALLY POLYAMINES OR IMINES, OR AMINO ACIDS SUCH AS ALANINE OR EDTA. THESE AMINO COMPOUNDS ARE ESPECIALLY EFFECTIVE IN ACID COPPER SULFATE PLATING BATHS FOR THE CODEPOSITION OF DISPERSED FINE, BATH-INSOLUBLE, NONCONDUCTING PARTICLES. THESE 2-PHASE COMPOSITE COPPER PLATES HAVE ENGINEERING USE POSSIBLITIES FOR ANTI-FRICTION AND ANTI-SEIZING PROBLEMS.
Inventors
- 👤 Thaddeus W Tomaszewski
- 👤 Lillie C Tomaszewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:52
CPC Classifications
C; C25; C25D; C25D15/00; C25D15/02
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |