US2829076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preventing staining of aluminum during annealing
Assignee: Sunoco Inc
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Filing: 1955-03-17
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Granted: 1958-04-01
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Expires: 1975-03-17
Abstract
No abstract record available.
Inventors
- 👤 Howard M Rue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:58
CPC Classifications
C; C22; C22C; C22C21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN THE ANNEALING OF ALUMINUM HAVING A SURFACE FILM OF HYDROCARBON LUBRICANT THEREON, THE METHOD OF PREVENTING STAINING OF THE ALUMNIUM SURFACE WHICH COMPRISES SUBJECTING THE ALUMINUM TO AN ANNEALING TEMPERATURE IN THE PRESENCE OF A SURFACE FILM OF LUBRICANT COMPRISING HYDROCARBON OIL HAVING INCORPORATED THEREIN A MINOR AMOUNT OF ELEMENTAL SULFUR BETWEEN 0.05% BY WEIGHT AND THE AMOUNT REQUIRED TO SATURATE THE OIL AT ATMOSPHERIC TEMPERATURE.
Claim 2
Dependent Claim
67 words
IN THE ANNEALING OF ALUMINUM HAVING A SURFACE FILM OF HYDROCARBON LUBRICANT THEREON, THE METHOD OF PREVENTING STAINING OF THE ALUMNIUM SURFACE WHICH COMPRISES SUBJECTING THE ALUMINUM TO AN ANNEALING TEMPERATURE IN THE PRESENCE OF A SURFACE FILM OF LUBRICANT COMPRISING HYDROCARBON OIL HAVING INCORPORATED THEREIN A MINOR AMOUNT OF ELEMENTAL SULFUR BETWEEN 0.05% BY WEIGHT AND THE AMOUNT REQUIRED TO SATURATE THE OIL AT ATMOSPHERIC TEMPERATURE.
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) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |