Patent US2756131A successfully refreshed from Google Patents.
US2756131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for glossing articles made of aluminum and particularly pure aluminum and its alloys
Assignee: Vereinigte Aluminium Werke AG
•
Filing: 1953-08-18
•
Granted: 1956-07-24
•
Expires: 1973-08-18
Abstract
No abstract record available.
Inventors
- 👤 Neunzig Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:34
CPC Classifications
C; C23; C23F; C23F3/00; C23F3/02; C23F3/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD FOR BRIGHTENING THE SURFACE OF ARTICLES MADE OF ALUMINUM AND OF ALUMINUM ALLOYS AND PARTICULARLY MAGNESIUM CONTAINING ALUMINUM ALLOYS COMPRISING APPLYING TO SAID ARTICLES A HOT AQUEOUS SOLUTION CONTAINING PER LITER BETWEEN 1.6 TO 2.7 GRAM MOLECULES OF NITRIC ACID, BETWEEN 1.8 TO 3.5 GRAM MOLECULES OF AMMONIUM, 3.5 TO 7.0 GRAMS MOLECULES OF HYDROFLUORIC ACID, 2.5 TIMES 10-5 TO 2.5 TIMES 10-4 GRAM MOLECULES LEAD NITRATE AND 0.5 TO 2 PERCENT OF AN INHIBITOR SELECTED FROM A GROUP CONSISTING OF GUM ARABIC AND DEXTRIN.
Claim 2
Independent Claim
87 words
A METHOD FOR BRIGHTENING THE SURFACE OF ARTICLES MADE OF ALUMINUM AND OF ALUMINUM ALLOYS AND PARTICULARLY MAGNESIUM CONTAINING ALUMINUM ALLOYS COMPRISING APPLYING TO SAID ARTICLES A HOT AQUEOUS SOLUTION CONTAINING PER LITER BETWEEN 1.6 TO 2.7 GRAM MOLECULES OF NITRIC ACID, BETWEEN 1.8 TO 3.5 GRAM MOLECULES OF AMMONIUM, 3.5 TO 7.0 GRAMS MOLECULES OF HYDROFLUORIC ACID, 2.5 TIMES 10-5 TO 2.5 TIMES 10-4 GRAM MOLECULES LEAD NITRATE AND 0.5 TO 2 PERCENT OF AN INHIBITOR SELECTED FROM A GROUP CONSISTING OF GUM ARABIC AND DEXTRIN.
References Cited (Backward Citations)
US2614912A
Cited
US2650156A
Cited
US2593447A
Cited
US2614913A
Cited
US2593449A
Cited
US2650875A
Cited
US2625468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |