US3094489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for brightening aluminum
Assignee: Monsanto Chemicals Ltd
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Filing: 1959-08-31
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Granted: 1963-06-18
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Expires: 1979-08-31
Abstract
No abstract record available.
Inventors
- 👤 Marion D Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:50
CPC Classifications
C; C23; C23F; C23F3/00; C23F3/02; C23F3/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A LIQUID CONCENTRATED PHOSPHROIC ACID USEFUL, WHEN INTERMIXED WITH FROM ABOUT 0.5 TO ABOUT 50 WEIGHT PERCENT, BASED ON THE WEIGHT OF SAID CONCENTRATED PHOSPHORIC ACID, OR NITRIC ACID, FOR INHIBITING THE NORMAL TENDENCY OF THE RESULTING COMPOSITION TO EVOLVE NITRIC OXIDE FUMES WHEN THE IONIC RATIO OF NH4+/NO3 - IN SAID RESULTING COMPOSITION IS AT LEAST ABOUT 0.8, AND WHEN IT IS UTILIZED FOR BRIGHTENING SURFACES OF METALLIC ALUMINUM AND ALUMINUM ALLOYS; SAID CONCENTRATED PHOSPHORIC ACID CONTAINING LESS THAN ABOUT 25 WEIGHT PERCENT OF WATER, AND SAID ACID HAVING INTERMIXED THEREWITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF AMMONIA, AMMONIUM HYDROXIDE AND AMMONIUM SALTS IN AN AMOUNT SUFFICIENT TO PRODUCE AN AMMONIUM ION CONCENTRATION BETWEEN ABOUT 0.25 AND ABOUT 4 WEIGHT PERCENT.
Claim 2
Dependent Claim
124 words
A LIQUID CONCENTRATED PHOSPHROIC ACID USEFUL, WHEN INTERMIXED WITH FROM ABOUT 0.5 TO ABOUT 50 WEIGHT PERCENT, BASED ON THE WEIGHT OF SAID CONCENTRATED PHOSPHORIC ACID, OR NITRIC ACID, FOR INHIBITING THE NORMAL TENDENCY OF THE RESULTING COMPOSITION TO EVOLVE NITRIC OXIDE FUMES WHEN THE IONIC RATIO OF NH4+/NO3 - IN SAID RESULTING COMPOSITION IS AT LEAST ABOUT 0.8, AND WHEN IT IS UTILIZED FOR BRIGHTENING SURFACES OF METALLIC ALUMINUM AND ALUMINUM ALLOYS; SAID CONCENTRATED PHOSPHORIC ACID CONTAINING LESS THAN ABOUT 25 WEIGHT PERCENT OF WATER, AND SAID ACID HAVING INTERMIXED THEREWITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF AMMONIA, AMMONIUM HYDROXIDE AND AMMONIUM SALTS IN AN AMOUNT SUFFICIENT TO PRODUCE AN AMMONIUM ION CONCENTRATION BETWEEN ABOUT 0.25 AND ABOUT 4 WEIGHT PERCENT.
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) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |