US3728137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroless copper plating
Assignee: Shipley Co Inc
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Filing: 1971-08-23
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Granted: 1973-04-17
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Expires: 1991-08-23
Abstract
Abstract AN ELECTROLESS COPPER PLATING SOLUTION COMPRISING A SOURCE OF CUPRIC IONS, HYDROXYL RADICALS, FORMALDEHYDE OR A FORMALDEHYDE PRECURSOR SUCH S PARAFORMALDEHYDE AND A COMPLEXING AGENT FOR COPPER, SAID SOLUTION CHARACTERIZED BY THE ADDITION AGENT PROVIDES FOR THE SLOW THE FORMALDEHYDE ADDITION AGENT PROVIDES FOR THE SLOW RELEASE OF FORMALDEHYDE INTO SOLUTION AND CONTRIBUTES TO IMPROVED TENSILE PROPERTIES OF A COPPER DEPOSIT.
Inventors
- 👤 C Shipley
- 👤 O Dutkewych
- 👤 L Shipley
- 👤 M Gulla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:57
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/38; C23C18/40; C23C18/405
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |