Patent US2689785A successfully refreshed from Google Patents.
US2689785A
Expired / Lapsed
US
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Method for chemically polishing lead
Assignee: United States Department of the Navy
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Filing: 1953-03-18
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Granted: 1954-09-21
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Expires: 1973-03-18
Abstract
No abstract record available.
Inventors
- 👤 Albert C Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:32
CPC Classifications
C; C23; C23F; C23F3/00; C23F3/04; C23F3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A METHOD OF PRODUCING A POLISH OF HIGH LUSTER ON A LEAD SURFACE WHICH COMPRISES IMMERSING THE LEAD SURFACE IN CLEAN SMOOTH CONDITION INTO AN AQUEOUS POLISHING SOLUTION OF HYDROGEN PEROXIDE AND ACETIC ACID AND VIGOROUSLY AGITATING IT THEREIN FOR A TIME SUFFICIENT TO DEVELOP A POLISH OF HIGH LUSTER THEREON, QUICKLY WASHING THE POLISHING SOLUTION FROM THE LEAD SURFACE WITH AQUEOUS ACETIC ACID OF A CONCENTRATION NOT APPRECIABLY LESS THAN THAT OF THE POLISHING SOLUTION AND THEN WASHING THE LEAD SURFACE WITH WATER TO REMOVE THE ACETIC ACID, SAID POLISHING SOLUTION CONTAINING BETWEEN ABOUT 10 AND 25% BY WEIGHT HYDROGEN PEROXIDE AND BETWEEN ABOUT 15 AND 70% BY WEIGHT ACETIC ACID IN INVERSE PROPORTION AND IN A WEIGHT RATIO OF ACETIC ACID TO HYDROGEN PEROXIDE WHICH FOR EACH UNIT OF 5 WEIGHT PERCENT OF ACETIC ACID DECREASES WITH INCREASE IN THE HYDROGEN PEROXIDE CONTENT BY A FACTOR WHICH IS ABOUT 3.3% FOR EACH 1% INCREASE IN WEIGHT OF THE HYDROGEN PEROXIDE.
Claim 2
Independent Claim
162 words
A METHOD OF PRODUCING A POLISH OF HIGH LUSTER ON A LEAD SURFACE WHICH COMPRISES IMMERSING THE LEAD SURFACE IN CLEAN SMOOTH CONDITION INTO AN AQUEOUS POLISHING SOLUTION OF HYDROGEN PEROXIDE AND ACETIC ACID AND VIGOROUSLY AGITATING IT THEREIN FOR A TIME SUFFICIENT TO DEVELOP A POLISH OF HIGH LUSTER THEREON, QUICKLY WASHING THE POLISHING SOLUTION FROM THE LEAD SURFACE WITH AQUEOUS ACETIC ACID OF A CONCENTRATION NOT APPRECIABLY LESS THAN THAT OF THE POLISHING SOLUTION AND THEN WASHING THE LEAD SURFACE WITH WATER TO REMOVE THE ACETIC ACID, SAID POLISHING SOLUTION CONTAINING BETWEEN ABOUT 10 AND 25% BY WEIGHT HYDROGEN PEROXIDE AND BETWEEN ABOUT 15 AND 70% BY WEIGHT ACETIC ACID IN INVERSE PROPORTION AND IN A WEIGHT RATIO OF ACETIC ACID TO HYDROGEN PEROXIDE WHICH FOR EACH UNIT OF 5 WEIGHT PERCENT OF ACETIC ACID DECREASES WITH INCREASE IN THE HYDROGEN PEROXIDE CONTENT BY A FACTOR WHICH IS ABOUT 3.3% FOR EACH 1% INCREASE IN WEIGHT OF THE HYDROGEN PEROXIDE.
References Cited (Backward Citations)
US2446060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |