US2903403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of copper-plating metal surfaces
Assignee: Dehydag Deutsche Hydrierwerke GmbH
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Filing: 1954-09-28
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Granted: 1959-09-08
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Expires: 1974-09-28
Abstract
No abstract record available.
Inventors
- 👤 Strauss Wennemar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:09
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/38; C23F; C23F11/00; C23F11/08; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; C23G1/065; C25; C25D; C25D3/00; C25D3/02; C25D3/38; C25D5/00; C25D5/34
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
THE METHOD OF PRODUCING COPPER DEPOSITS ON SURFAES OF METAL OBJECTS, SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF IRON, ZINC, ALUMINUM AND ELECTROCHEMICALLY ACTIVE STEELS, WHICH COMPRISES PICKLING SAID OBJECTS IN AN ACID PICKLING BATH CONTAINING AN INHIBITOR COMPOUND HAVING AN INHIBITING EFFECT OF AT LEAST 50% AND THEREAFTER APPLYING THE FINAL COPPER PLATE DIRECTLY TO THE PICKLED SURFACE OF SAID OBJECTS TO WHICH A QUANTITY OF PICKLING BATH SOLUTION REMAINS ADHERENT BY ELECTROPLATING SAID OBJECTS IN AN ACID SOLUTION OF A COPPER SALT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |