US2817627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for plating bright brass
Assignee: Individual
•
Filing: 1955-07-11
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Granted: 1957-12-24
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Expires: 1975-07-11
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 13:51
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A BATH FOR PLATING BRIGHT BRASS WHICH COMPRISES COPPER CYANIDE, ALKALI METAL CYANIDE, SOLUBLE COMPLEX ZINC-POLYAMINE AND AN ALKYLPOLYAMINE HAVING AT LEAST TWO AMINO GROUPS, THE ALKYL GROUPS THEREOF HAVING 2 TO 8 CARBON ATOMS, SAID POLYAMINE HAVING A MOLECULAR WEIGHT UP TO 1800,THE AMOUNT OF SAID POLYAMINE BEING SUFFICIENT TO FORM SAID COMPLEX AND PROVIDE AN EXCESS OF UNCOMPLEXED POLYAMINE, THE RATIO OF COPPER TO ZINC BEING ABOUT 4-40 TO 1, SUBSTANTIALLY ALL THE COPPER BEING PRESENT IN THE FORM OF CUPROCYANIDE.
Claim 2
Dependent Claim
83 words
A BATH FOR PLATING BRIGHT BRASS WHICH COMPRISES COPPER CYANIDE, ALKALI METAL CYANIDE, SOLUBLE COMPLEX ZINC-POLYAMINE AND AN ALKYLPOLYAMINE HAVING AT LEAST TWO AMINO GROUPS, THE ALKYL GROUPS THEREOF HAVING 2 TO 8 CARBON ATOMS, SAID POLYAMINE HAVING A MOLECULAR WEIGHT UP TO 1800,THE AMOUNT OF SAID POLYAMINE BEING SUFFICIENT TO FORM SAID COMPLEX AND PROVIDE AN EXCESS OF UNCOMPLEXED POLYAMINE, THE RATIO OF COPPER TO ZINC BEING ABOUT 4-40 TO 1, SUBSTANTIALLY ALL THE COPPER BEING PRESENT IN THE FORM OF CUPROCYANIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |