Patent US2197405A successfully refreshed from Google Patents.
US2197405A
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Method of treating aluminum surfaces
Assignee: Alcoa Corp
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Filing: 1937-04-12
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Granted: 1940-04-16
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Expires: 1957-04-12
Abstract
No abstract record available.
Inventors
- 👤 Junius D Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:34
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/12; C23G1/125; C09; C09J; C09J5/00; C09J5/02; C23C; C23C22/00; C23C22/02; C23C22/03; D; D21; D21H; D21H19/00; D21H19/02; D21H19/04; C09J2400/00; C09J2400/10; C09J2400/16; C09J2400/166
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-04-16 | 1943-10-16 | 1944-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-04-16 | 1947-10-16 | 1948-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-04-16 | 1951-10-16 | 1952-04-16 | $7700.00 | Window Closed / Lapsed |