US2813066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylpolyamine-modified cyanide copper plating bath
Assignee: Individual
•
Filing: 1955-11-14
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Granted: 1957-11-12
•
Expires: 1975-11-14
Abstract
No abstract record available.
Inventors
- 👤 Barnet D Ostrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:45
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/38; C25D3/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A METHOD OF TREATING CYANIDE COPPER PLATING BATHS HAVING THERIN FREE ALKALI METAL HYDROXIDE AND CONTAINING SOLUBLE CONTAMINATS TAKEN FROM THE CLASS CONSISTING OF ZINC, CHROMIUN AND NICKEL WHICH COMPRISES ADDING TO SAID BATH AN UNSUBSTITUTED ALKYLPOLYAMINE IN SUFFICIENT AMOUNT TO SEQUESTER SAID CONTAMINANTS, SAID AMINE HAVING 2 TO 6 AMINO GROUPS AND THE ALKYL GROUPS EACH HAVING 1 TO 3 CARBON ATOMS.
Claim 2
Independent Claim
63 words
A METHOD OF TREATING CYANIDE COPPER PLATING BATHS HAVING THERIN FREE ALKALI METAL HYDROXIDE AND CONTAINING SOLUBLE CONTAMINATS TAKEN FROM THE CLASS CONSISTING OF ZINC, CHROMIUN AND NICKEL WHICH COMPRISES ADDING TO SAID BATH AN UNSUBSTITUTED ALKYLPOLYAMINE IN SUFFICIENT AMOUNT TO SEQUESTER SAID CONTAMINANTS, SAID AMINE HAVING 2 TO 6 AMINO GROUPS AND THE ALKYL GROUPS EACH HAVING 1 TO 3 CARBON ATOMS.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |