US2967136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical brightening and electrolytic polishing of aluminum
Assignee: Reynolds Metals Co
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Filing: 1954-03-01
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Granted: 1961-01-03
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Expires: 1974-03-01
Abstract
No abstract record available.
Inventors
- 👤 Cybriwsky Alexander
- 👤 Mostovych Nicholas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:59
CPC Classifications
C; C23; C23F; C23F3/00; C23F3/02; C23F3/03; C25; C25F; C25F3/00; C25F3/16; C25F3/18; C25F3/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
126 words
A METHOD FOR SURFACE BRIGHTENING AND POLISHING AN ARTICLE COMPOSED OF A METAL SELECTED FROM A GROUP CONSISTING OF ALUMINUM AND ITS ALLOYS COMPRISING: PROVIDING A BATH CONSISTING ESSENTIALLY OF SULFURIC ACID, PHOSPHORIC ACID AND WATER, CORRESPONDING, IN NATURE AND AMOUNT, AT ROOM TEMPERATURE TO A MIXTURE OF COMMERCIAL SULFURIC AND PHOSPHORIC ACIDS IN ROOM TEMPERATURE VOLUME RATIOS RANGING FROM 70% COMMERCIAL SULFURIC OVER 30% COMMERCIAL PHOSPHORIC TO 85% COMMERCIAL SULFURIC OVER 15% COMMERCIAL PHOSPHORIC SO THAT THE TOTAL WATER-FREE ACID CONTENT OF THE BATH RANGES FROM ABOUT 88 1/2% TO ABOUT 90 1/2% OF THE TOTAL VOLUME OF THE BATH, HEATING THE BATH TO A TEMPERATURE RANGING FROM ABOUT 200*F. TO ABOUT 300*F., AND DIPPING THE ARTICLE IN THE HEATED BATH FOR SURFACE BRIGHTENING PURPOSES.
Claim 2
Independent Claim
126 words
A METHOD FOR SURFACE BRIGHTENING AND POLISHING AN ARTICLE COMPOSED OF A METAL SELECTED FROM A GROUP CONSISTING OF ALUMINUM AND ITS ALLOYS COMPRISING: PROVIDING A BATH CONSISTING ESSENTIALLY OF SULFURIC ACID, PHOSPHORIC ACID AND WATER, CORRESPONDING, IN NATURE AND AMOUNT, AT ROOM TEMPERATURE TO A MIXTURE OF COMMERCIAL SULFURIC AND PHOSPHORIC ACIDS IN ROOM TEMPERATURE VOLUME RATIOS RANGING FROM 70% COMMERCIAL SULFURIC OVER 30% COMMERCIAL PHOSPHORIC TO 85% COMMERCIAL SULFURIC OVER 15% COMMERCIAL PHOSPHORIC SO THAT THE TOTAL WATER-FREE ACID CONTENT OF THE BATH RANGES FROM ABOUT 88 1/2% TO ABOUT 90 1/2% OF THE TOTAL VOLUME OF THE BATH, HEATING THE BATH TO A TEMPERATURE RANGING FROM ABOUT 200*F. TO ABOUT 300*F., AND DIPPING THE ARTICLE IN THE HEATED BATH FOR SURFACE BRIGHTENING PURPOSES.
Claim 3
Dependent Claim
44 words
THE METHOD OF CLAIM 1 WHEREIN: THE BATH IS HEATED TO A TEMPERATURE NOT SUBSTANTIALLY HIGHER THAN 250*F., AND THE DIPPING STEP INCLUDES DIPPING THE ARTICLE INTO THE BATH, WITH AN ELECTRIC CURRENT FLOWING FROM THE ARTICLE THROUGH THE BATH, FOR ELECTROLYTIC POLISHING PURPOSES.
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) | 1964-01-03 | 1964-07-04 | 1965-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-03 | 1968-07-04 | 1969-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-03 | 1972-07-04 | 1973-01-03 | $7700.00 | Window Closed / Lapsed |