Patent US2902439A successfully refreshed from Google Patents.
US2902439A
Expired / Lapsed
US
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Reclamation of aluminum fabricating lubricants
Assignee: Alcoa Corp
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Filing: 1958-07-03
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Granted: 1959-09-01
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Expires: 1978-07-03
Abstract
No abstract record available.
Inventors
- 👤 Wendell C Milz
- 👤 William M Mcclintock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:57
CPC Classifications
C; C10; C10G; C10G19/00; C10M; C10M175/00; C10M175/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
IN THE RECLAMATION OF HYDROCARBONACEOUS LUBRICANTS UTILIZED IN THE FABRICATION OF ALUMINUM AND ALUMINUM BASE ALLOY ARTICLES AND CONTAMINATED WITH ALUMINUM PARTICLES THE METHOD CLEANING SOLUTION CONTAINING ESSENTIALLY SODIUM AQUEOUS CLEANING SOLUTION CONTAINING ESSENTIALLY SODIUM ALUMINATE AND AT LEAST AN EQUAL WEIGHT OF SODIUM HYDROXIDE; AGITATING THE ADMIXTURE AT A TEMPERATURE OF 120 TO 210*F. UNTIL A COLOR CHANGE OCCURS; AND THEREAFTER SEPARATING THE AQUEOUS CLEANING SOLUTION CONTAINING SAID CONTAMINANTS.
Claim 2
Dependent Claim
70 words
IN THE RECLAMATION OF HYDROCARBONACEOUS LUBRICANTS UTILIZED IN THE FABRICATION OF ALUMINUM AND ALUMINUM BASE ALLOY ARTICLES AND CONTAMINATED WITH ALUMINUM PARTICLES THE METHOD CLEANING SOLUTION CONTAINING ESSENTIALLY SODIUM AQUEOUS CLEANING SOLUTION CONTAINING ESSENTIALLY SODIUM ALUMINATE AND AT LEAST AN EQUAL WEIGHT OF SODIUM HYDROXIDE; AGITATING THE ADMIXTURE AT A TEMPERATURE OF 120 TO 210*F. UNTIL A COLOR CHANGE OCCURS; AND THEREAFTER SEPARATING THE AQUEOUS CLEANING SOLUTION CONTAINING SAID CONTAMINANTS.
References Cited (Backward Citations)
US1747161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |