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Patent US2682503A successfully refreshed from Google Patents.
US2682503A
Expired / Lapsed
US
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Method and material for electrolytically brightening aluminum surfaces
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1950-07-19
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Granted: 1954-06-29
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Expires: 1970-07-19
Abstract
No abstract record available.
Inventors
- 👤 Frederick H Hesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:19
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16; C25F3/18; C25F3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A METHOD OF BRIGHTENING ALUMINUM SURFACES COMPRISING SUBJECTING THE SURFACE AS ANODE TO AND ELECTROLYTIC TREATMENT IN AN ELECTROLYTE CONSISTING ESSENTIALLY OF FROM ABOUT 0.1% TO 0.8% HF, FROM ABUT 0.05 TO 0.4% HSO3NH2 AND FROM ABOUT 0.3 TO 2.1% CRO3, BALANCE SUBSTANTIALLY ALL WATER, SAID PERCENTAGES BEING BY WEIGHT OF THE TOTAL SOLUTION.
Claim 2
Independent Claim
54 words
A METHOD OF BRIGHTENING ALUMINUM SURFACES COMPRISING SUBJECTING THE SURFACE AS ANODE TO AND ELECTROLYTIC TREATMENT IN AN ELECTROLYTE CONSISTING ESSENTIALLY OF FROM ABOUT 0.1% TO 0.8% HF, FROM ABUT 0.05 TO 0.4% HSO3NH2 AND FROM ABOUT 0.3 TO 2.1% CRO3, BALANCE SUBSTANTIALLY ALL WATER, SAID PERCENTAGES BEING BY WEIGHT OF THE TOTAL SOLUTION.
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) | 1957-06-28 | 1957-12-28 | 1958-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-28 | 1961-12-28 | 1962-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-28 | 1965-12-28 | 1966-06-29 | $7700.00 | Window Closed / Lapsed |