US2471909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and materials for producing coated aluminum
Assignee: Henkel Corp
•
Filing: 1946-03-09
•
Granted: 1949-05-31
•
Expires: 1966-03-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank Palin Spruance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:20
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1072485A
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US1583006A
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US1938961A
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US2005780A
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US2012976A
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US2385800A
Cited
US2438877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |