Patent US3257294A successfully refreshed from Google Patents.
US3257294A
Expired / Lapsed
US
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Acid metal electroplating process and baths
Assignee: Dehydag Deutsche Hydrierwerke GmbH
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Filing: 1962-08-03
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Granted: 1966-06-21
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Expires: 1982-08-03
Abstract
No abstract record available.
Inventors
- 👤 Michael Gregor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:28
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/20; C07D295/21; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/42; C25; C25D; C25D21/00; C25D21/12; C25D21/14; C25D3/00; C25D3/02; C25D3/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A SELF-REGULATING ELECTROPLATING BATH FOR THE ELECTRODEPOSITION OF METALS CAPABLE OF BEING ELECTRODEPOSITED FROM ACID SOLUTION, SAID BATH COMPRISING (1) AN ACID SOLUTION OF AN INORGANIC SALT OF THE METAL TO BE ELECTRODEPOSITED, AND (2) A HETEROGENEOUS PHASE CONSISTING SOLELY OF AN AUXILI-ARY ELECTROPLATE-IMPROVING ORGANIC ADDITION AGENT WHICH (A) IS SPARSELY SOLUBLE IN SAID ACID ELECTROPLATING BATH, (B) HAS A SATURATION CONCENTRATION OF 0.5 TO 500 MGM. PER LITER OF ELECTROPLATING BATH LIQUID, AND (C) HAS A CRITICAL CONCENTRATION OF ABOUT HALF OF SAID SATURATION CONCENTRATION, SAID ADDITION AGENT BEING PRESENT IN SAID BATH IN MULTIPLE QUANTITIES OF SAID SATURATION CONCENTRATION.
Claim 2
Dependent Claim
101 words
A SELF-REGULATING ELECTROPLATING BATH FOR THE ELECTRODEPOSITION OF METALS CAPABLE OF BEING ELECTRODEPOSITED FROM ACID SOLUTION, SAID BATH COMPRISING (1) AN ACID SOLUTION OF AN INORGANIC SALT OF THE METAL TO BE ELECTRODEPOSITED, AND (2) A HETEROGENEOUS PHASE CONSISTING SOLELY OF AN AUXILI-ARY ELECTROPLATE-IMPROVING ORGANIC ADDITION AGENT WHICH (A) IS SPARSELY SOLUBLE IN SAID ACID ELECTROPLATING BATH, (B) HAS A SATURATION CONCENTRATION OF 0.5 TO 500 MGM. PER LITER OF ELECTROPLATING BATH LIQUID, AND (C) HAS A CRITICAL CONCENTRATION OF ABOUT HALF OF SAID SATURATION CONCENTRATION, SAID ADDITION AGENT BEING PRESENT IN SAID BATH IN MULTIPLE QUANTITIES OF SAID SATURATION CONCENTRATION.
References Cited (Backward Citations)
US1003092A
Cited
US1371414A
Cited
US2248092A
Cited
US2449422A
Cited
US2640021A
Cited
US2879211A
Cited
US2885399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |