US2431595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for cleaning aluminum
Assignee: Alcoa Corp
•
Filing: 1942-08-06
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Granted: 1947-11-25
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Expires: 1962-08-06
Abstract
No abstract record available.
Inventors
- 👤 Wayne E White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:18
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/28; C23G1/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US590996A
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US597111A
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US1011203A
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FR732230A
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US2052278A
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US2213263A
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DE661937C
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US2257960A
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US2316220A
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US2276232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-24 | 1951-05-26 | 1951-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-24 | 1955-05-26 | 1955-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-24 | 1959-05-26 | 1959-11-25 | $7700.00 | Window Closed / Lapsed |