US2828252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of bright zinc, copper, or nickel
Assignee: Evonik Operations GmbH
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Filing: 1954-04-23
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Granted: 1958-03-25
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Expires: 1974-04-23
Abstract
No abstract record available.
Inventors
- 👤 Fischer Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:26
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A BRIGHT METAL ELECTROPLATING BATH FOR ELECTRODEPOSITING A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC, COPPER AND NICKEL COMPRISING AN AQUEOUS ELECTROLYTE OF THE METAL TO BE DEPOSITED WHICH CONTAINS AS A BRIGHTENER AT LEAST 0.5 GRAM PER LITER OF A CONDENSATION PRODUCT OF AN INSATURATED ALEDHYDE SELECTED FROM THE GROUP CONSISTING OF ACROLEIN AND ITS ALPHA SUBSTITUTION PRODUCTS, AND A UREA OF THE GENERAL FORMULA
Claim 2
Dependent Claim
67 words
A BRIGHT METAL ELECTROPLATING BATH FOR ELECTRODEPOSITING A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC, COPPER AND NICKEL COMPRISING AN AQUEOUS ELECTROLYTE OF THE METAL TO BE DEPOSITED WHICH CONTAINS AS A BRIGHTENER AT LEAST 0.5 GRAM PER LITER OF A CONDENSATION PRODUCT OF AN INSATURATED ALEDHYDE SELECTED FROM THE GROUP CONSISTING OF ACROLEIN AND ITS ALPHA SUBSTITUTION PRODUCTS, AND A UREA OF THE GENERAL FORMULA
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) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |