US4088549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bright low karat silver gold electroplating
Assignee: Oxy Metal Industries Corp
•
Filing: 1976-04-13
•
Granted: 1978-05-09
•
Expires: 1996-04-13
Abstract
Abstract Disclosed is an aqueous electroplating bath and process for obtaining bright deposits of silver-gold alloys. The bath contains a polyakylene imine and an alkylene polyamine.
Inventors
- 👤 John M. Deuber
- 👤 Peter Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:21
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/64
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
72 words
An aqueous alkaline electroplating bath having a pH within the range of about 9 to 11 and suitable for depositing silver-gold alloys comprising gold and silver in depositable form and containing as additional components about 0.001 to 0.1 g/l of a polyalkleneimine, and not more than about 5.0 g/l of an alkylene polyamine, whereby the bath is relatively stable, drag-out losses are minimized and fully bright deposits are obtained from said bath.
Claim 2
Dependent Claim
72 words
An aqueous alkaline electroplating bath having a pH within the range of about 9 to 11 and suitable for depositing silver-gold alloys comprising gold and silver in depositable form and containing as additional components about 0.001 to 0.1 g/l of a polyalkleneimine, and not more than about 5.0 g/l of an alkylene polyamine, whereby the bath is relatively stable, drag-out losses are minimized and fully bright deposits are obtained from said bath.
Claim 3
Dependent Claim
44 words
An electroplating bath as defined in claim 1, in which the alkylene polyamine is selected from the group consisting of ethylene diamine, diethylene triamine, triethylenetetramine, tetraethylene pentamine, pentaethylene hexamine the propylene homologs of the foregoing and the hydroxy derivatives of any of the foregoing.
Claim 4
Dependent Claim
14 words
An electroplating bath as defined in claim 1, in which the polyalkyleneimine is polyethyleneimine.
Claim 5
Dependent Claim
35 words
An electroplating bath as defined in claim 1, in which the molecular weight of the polyalkyleneimine is between about 600 and 100,000 and the molecular weight of the alkylene polyamine does not exceed about 500.
Claim 6
Dependent Claim
17 words
An electroplating bath as defined in claim 1, in which there is also present a conducting salt.
Claim 7
Dependent Claim
17 words
An electroplating bath as defined in claim 1, in which there is also present a chelating agent.
Claim 8
Dependent Claim
16 words
An electroplating bath as defined in claim 1, in which there is present a wetting agent.
Claim 9
Dependent Claim
17 words
An electroplating process comprising electrolysing the bath of claim 1, with a conductive surface as the cathode.
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) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |