Patent US3309293A successfully refreshed from Google Patents.
US3309293A
Expired / Lapsed
US
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Copper cyanide electroplating bath
Assignee: Elechem Corp
•
Filing: 1964-11-16
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Granted: 1967-03-14
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Expires: 1984-11-16
Abstract
No abstract record available.
Inventors
- 👤 Barnet D Ostrow
- 👤 Fred I Nobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:04
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/38; C25D3/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN AN AQUEOUS ALKALINE CYANIDE COPPER PLATING BATH, THE IMPROVEMENT WHICH COMPRISES THE ADDITION TO SAID BATH OF RNH(CH2)YSO3X; IN THE AMOUNT OF 0.001 G/L. TO THE LIMIT OF SOLUBILITY AND WHEREIN R IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS HAVING 6 TO 20 CARBON ATOMS, X IS H OR ALKALI METAL, AND Y IS 1 TO 6.
Claim 2
Dependent Claim
62 words
IN AN AQUEOUS ALKALINE CYANIDE COPPER PLATING BATH, THE IMPROVEMENT WHICH COMPRISES THE ADDITION TO SAID BATH OF RNH(CH2)YSO3X; IN THE AMOUNT OF 0.001 G/L. TO THE LIMIT OF SOLUBILITY AND WHEREIN R IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS HAVING 6 TO 20 CARBON ATOMS, X IS H OR ALKALI METAL, AND Y IS 1 TO 6.
References Cited (Backward Citations)
US2255057A
Cited
US2541700A
Cited
US2828252A
Cited
US2765269A
Cited
US2817627A
Cited
US2848394A
Cited
US2873235A
Cited
US2873234A
Cited
US3111465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |