Patent US2685564A successfully refreshed from Google Patents.
US2685564A
Expired / Lapsed
US
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Electrolytic cleaning process
Assignee: Detrex Corp
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Filing: 1949-06-25
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Granted: 1954-08-03
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Expires: 1969-06-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert A Emmett
- 👤 Wilbur H Petering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:07
CPC Classifications
C; C25; C25F; C25F1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A PROCESS FOR THE ELECTROLYTIC CLEANING OF SMUT-LIKE, MATERIALS FROM METAL ARTICLES IN WHICH THE ARTICLE SERVES AS ONE OF THE ELECTRODES, THE STEPS WHICH COMPRISES IMMERSING THE SURFACE TO BE CLEANED IN AN AQUEOUS SOLUTION OF A CLEANING COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE POLYPHOSPHATES, CITRATES, MONO PHOSPHATES, ACETIC ACID-ACETATE MIXTURES, BICARBONATES AND DICHROMATES, SAID SOLUTION HAVING A PH OF APPROXIMATELY 3.5 TO APPROXIMATELY 10, AND PASSING AN ASYMMETRIC REVERSING ELECTRIC CURRENT THROUGH SAID METAL AND THROUGH SAID SOLUTION, THE RELATIVE CURRENT VALUES BEING SUCH THAT THE TOTAL QUANTITY OF POSITIVE ELECTRICITY PASSED IS GREATER THAN THE TOTAL QUANTITY OF NEGATIVE ELECTRICITY PASSED, THE RATIO OF TIME OF APPLICATION OF POSITIVE CURRENT TO TIME OF APPLICATION OF NEGATIVE CURRENT BEING IN THE RANGE OF 2:1 TO 8:1.
Claim 2
Dependent Claim
131 words
IN A PROCESS FOR THE ELECTROLYTIC CLEANING OF SMUT-LIKE, MATERIALS FROM METAL ARTICLES IN WHICH THE ARTICLE SERVES AS ONE OF THE ELECTRODES, THE STEPS WHICH COMPRISES IMMERSING THE SURFACE TO BE CLEANED IN AN AQUEOUS SOLUTION OF A CLEANING COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE POLYPHOSPHATES, CITRATES, MONO PHOSPHATES, ACETIC ACID-ACETATE MIXTURES, BICARBONATES AND DICHROMATES, SAID SOLUTION HAVING A PH OF APPROXIMATELY 3.5 TO APPROXIMATELY 10, AND PASSING AN ASYMMETRIC REVERSING ELECTRIC CURRENT THROUGH SAID METAL AND THROUGH SAID SOLUTION, THE RELATIVE CURRENT VALUES BEING SUCH THAT THE TOTAL QUANTITY OF POSITIVE ELECTRICITY PASSED IS GREATER THAN THE TOTAL QUANTITY OF NEGATIVE ELECTRICITY PASSED, THE RATIO OF TIME OF APPLICATION OF POSITIVE CURRENT TO TIME OF APPLICATION OF NEGATIVE CURRENT BEING IN THE RANGE OF 2:1 TO 8:1.
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) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |