US2746849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of imparting high brilliancy to articles made of aluminum and its alloys
Assignee: Individual
•
Filing: 1953-02-18
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Granted: 1956-05-22
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Expires: 1973-02-18
Abstract
No abstract record available.
Inventors
- 👤 Helling Werner
- 👤 Neunzig Heinrich
- 👤 Rolie Johannes
- 👤 Lattey Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:05
CPC Classifications
C; C23; C23F; C23F3/00; C23F3/02; C23F3/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A METHOD FOR IMPARTING HIGH GLOSS TO ARTICLES MADE OF ALUMINM AND ITS ALLOYS COMPRISING MAINTAINING THE SAID ARTICLES FOR A PERIOD OF ABOUT 5 TO 30 SECONDS AT A TEMPERATURE OF 50 TO 80* C., IN AN AQUEOUS SOLUTION CONTAINING PER LITER 1.6 TO 2.7 GRAM MOLECULES OF NITRIC ACID, 1.8 TO 3.5 GRAM MOLECULES OF AMMONIUM, 3.5 TO 7 GRAM MOLECULES OF HYDROFLUORIC ACID AND FROM 25 TIMES 10-5 TO 25 TIMES 10-4 GRAM MOLECULES OF LEAD NITRATE.
Claim 2
Independent Claim
80 words
A METHOD FOR IMPARTING HIGH GLOSS TO ARTICLES MADE OF ALUMINM AND ITS ALLOYS COMPRISING MAINTAINING THE SAID ARTICLES FOR A PERIOD OF ABOUT 5 TO 30 SECONDS AT A TEMPERATURE OF 50 TO 80* C., IN AN AQUEOUS SOLUTION CONTAINING PER LITER 1.6 TO 2.7 GRAM MOLECULES OF NITRIC ACID, 1.8 TO 3.5 GRAM MOLECULES OF AMMONIUM, 3.5 TO 7 GRAM MOLECULES OF HYDROFLUORIC ACID AND FROM 25 TIMES 10-5 TO 25 TIMES 10-4 GRAM MOLECULES OF LEAD NITRATE.
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) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |