US2702785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing hard chromium platings on light metals
Assignee: GEA Group AG
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Filing: 1951-05-07
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Granted: 1955-02-22
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Expires: 1971-05-07
Abstract
No abstract record available.
Inventors
- 👤 Eyerund Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:32
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; C25D5/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A METHOD OF APPLYING A STRONGLY ADHERENT HARD CHROMIUM PLATING UPON AN ARTICLE HAVING A SURFACE OF A LIGHT METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, ALUMINUM BASE ALLOYS, MAGNESIUM AND MAGNESIUM BASE ALLOYS WHICH COMPRISES PICKLING AND LIGHT METAL SURFACE TO REMOVE OXIDES, PLATING THE THUS CLEANED SURFACE WITH A THIN METAL LAYER OF A METAL SELECTED FROM THE GROUP CONSISTING OF BRASS, NICKEL, IRON AND COPPER, IMMERSING THE PLATED METAL SURFACE INTO A CHROMIUM PLATING BATH, SUBSTANTIALLY COMPLETELY DIS SOLVING SAID METAL LAYER FROM SAID LIGHT METAL SURFACE WHILE IMMERSED IN SAID CHROMIUM PLATING BATH AND THEN IMMEDIATELY ELECTROPLATING THE SURFACE WITH HARD CHROMIUM WHILE STILL IN SAID CHROMIUM PLATING BATH.
Claim 2
Independent Claim
114 words
A METHOD OF APPLYING A STRONGLY ADHERENT HARD CHROMIUM PLATING UPON AN ARTICLE HAVING A SURFACE OF A LIGHT METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, ALUMINUM BASE ALLOYS, MAGNESIUM AND MAGNESIUM BASE ALLOYS WHICH COMPRISES PICKLING AND LIGHT METAL SURFACE TO REMOVE OXIDES, PLATING THE THUS CLEANED SURFACE WITH A THIN METAL LAYER OF A METAL SELECTED FROM THE GROUP CONSISTING OF BRASS, NICKEL, IRON AND COPPER, IMMERSING THE PLATED METAL SURFACE INTO A CHROMIUM PLATING BATH, SUBSTANTIALLY COMPLETELY DIS SOLVING SAID METAL LAYER FROM SAID LIGHT METAL SURFACE WHILE IMMERSED IN SAID CHROMIUM PLATING BATH AND THEN IMMEDIATELY ELECTROPLATING THE SURFACE WITH HARD CHROMIUM WHILE STILL IN SAID CHROMIUM PLATING BATH.
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) | 1958-02-21 | 1958-08-23 | 1959-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-21 | 1962-08-23 | 1963-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-21 | 1966-08-23 | 1967-02-22 | $7700.00 | Window Closed / Lapsed |