Patent US2837472A successfully refreshed from Google Patents.
US2837472A
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Brighteners for electroplating baths
Assignee: Dehydag Deutsche Hydrierwerke GmbH
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Filing: 1955-12-13
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Granted: 1958-06-03
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Expires: 1975-12-13
Abstract
No abstract record available.
Inventors
- 👤 Gundel Wolfgang
- 👤 Haas Hermann
- 👤 Strauss Wennemar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:00
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42; C07; C07D; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/58; C25; C25D; C25D3/00; C25D3/02; C25D7/00; C25D7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
AN ELECTROPLATING BATH FOR PRODUCING ELECTRODEPOSITS OF METALS SELECTED FROM THE GROUP CONSISTING OF COPPER, NICKLE AND ZINC, COMPRISING AND ACID AQUEOUS SOLUTION OF AN INORGANIC SALT OF THE METAL TO BE DEPOSITED AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORGANIC SULFONIC ACIDS HAVING THE STRUCTURAL FORMULAS
Claim 2
Dependent Claim
49 words
AN ELECTROPLATING BATH FOR PRODUCING ELECTRODEPOSITS OF METALS SELECTED FROM THE GROUP CONSISTING OF COPPER, NICKLE AND ZINC, COMPRISING AND ACID AQUEOUS SOLUTION OF AN INORGANIC SALT OF THE METAL TO BE DEPOSITED AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORGANIC SULFONIC ACIDS HAVING THE STRUCTURAL FORMULAS
References Cited (Backward Citations)
US2647866A
Cited
US2663684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |