US2472864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for and method of chemically coating aluminum
Assignee: Henkel Corp
•
Filing: 1947-02-07
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Granted: 1949-06-14
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Expires: 1967-02-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank Palin Spruance
- 👤 James H Thirsk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:31
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/37; C23C22/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1583006A
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US1946151A
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US2066181A
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US2114151A
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US2213263A
Cited
US2203670A
Cited
US2312855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |