US2837484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removing carbonaceous deposits from aluminum molds
Assignee: Texo Corp
•
Filing: 1954-10-22
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Granted: 1958-06-03
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Expires: 1974-10-22
Abstract
No abstract record available.
Inventors
- 👤 Sway Boris
- 👤 Joseph W Callahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:15
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/12; C23G1/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE METHOD OF REMOVING ADHERENT CARBONACEOUS DEPOSITS FROM ALUMINUM MOLDS WITHOUT CAUSING SIGNIFICANT DAMAGE TO THE MOLDS, COMPRISING TREATING THE ALUMINUM MOLDS AND ADHERENT CARBONACEOUS DEPOSISTS, FOR A PERIOD OF TIME SUFFICIENT TO LOOSEN THE CARBONACEOUS DEPOSITS FROM THE SURFACES OF THE ALUMINUM MOLDS, WITH A COMPOSITION CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF FROM 20 TO 36 BY PARTS BY WEIGHT OF CHROMIC ACID AND FROM 2 TO 12 PARTS BY WEIGHT OF SULFURIC ACID IN FROM 300 TO 1,00 PARTS WATER, THE CHROMIC OF SULFURIC ACID BY WEIGHT, THEN WASHING THE ALUMINUM MOLDS WITH WATER.
Claim 2
Independent Claim
97 words
THE METHOD OF REMOVING ADHERENT CARBONACEOUS DEPOSITS FROM ALUMINUM MOLDS WITHOUT CAUSING SIGNIFICANT DAMAGE TO THE MOLDS, COMPRISING TREATING THE ALUMINUM MOLDS AND ADHERENT CARBONACEOUS DEPOSISTS, FOR A PERIOD OF TIME SUFFICIENT TO LOOSEN THE CARBONACEOUS DEPOSITS FROM THE SURFACES OF THE ALUMINUM MOLDS, WITH A COMPOSITION CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF FROM 20 TO 36 BY PARTS BY WEIGHT OF CHROMIC ACID AND FROM 2 TO 12 PARTS BY WEIGHT OF SULFURIC ACID IN FROM 300 TO 1,00 PARTS WATER, THE CHROMIC OF SULFURIC ACID BY WEIGHT, THEN WASHING THE ALUMINUM MOLDS WITH WATER.
References Cited (Backward Citations)
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Cited
US2052997A
Cited
US1952417A
Cited
US2186579A
Cited
US2334699A
Cited
US2453429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |