US3923613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acidic galvanic copper bath
Assignee: Kampschulte & Cie Dr W
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Filing: 1974-09-27
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Granted: 1975-12-02
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Expires: 1994-09-27
Abstract
Abstract An acidic galvanic copper bath of customary composition with organic sulfonic acids or the salts thereof as basic luster substances and/or with anion active and/or non-ionogenic wetting agents, in which the bath includes substituted urea derivatives.
Inventors
- 👤 Waldemar Immel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:08
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
23 words
IN AN ACIDIC GALVANIC COPPER BATH THE IMPROVEMENT COMPRISING PROVIDING THE BATH WITH A SUBSTITUTED UREA SELECTED FROM THE GROUP CONSISTING OF (PIPERIDINO-C(=S)-S-CH2-NH-)2-C=O
Claim 2
Dependent Claim
23 words
IN AN ACIDIC GALVANIC COPPER BATH THE IMPROVEMENT COMPRISING PROVIDING THE BATH WITH A SUBSTITUTED UREA SELECTED FROM THE GROUP CONSISTING OF (PIPERIDINO-C(=S)-S-CH2-NH-)2-C=O
Claim 3
Dependent Claim
25 words
A copper bath of claim 1 wherein the substituted urea is present in an amount from 5 X 10 4 to 2 grams per liter.
Claim 4
Dependent Claim
28 words
A copper bath of claim 1 wherein the substituted urea is present in an amount from 3 X 10 3 to 7.5 X 10 2 grams per liter.
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |